1375684831 has 4 divisors (see below), whose sum is σ = 1375763512. Its totient is φ = 1375606152.

The previous prime is 1375684787. The next prime is 1375684867. The reversal of 1375684831 is 1384865731.

1375684831 is a nontrivial binomial coefficient, being equal to C(52454, 2).

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1384865731 = 10459 ⋅132409.

It is a 3-Lehmer number, since φ(1375684831) divides (1375684831-1)³.

It is a cyclic number.

It is not a de Polignac number, because 1375684831 - 2⁷ = 1375684703 is a prime.

It is a super-2 number, since 2×1375684831² = 3785017508486997122, which contains 22 as substring.

It is a deceptive number, since it divides R_1375684830.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1375684231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1 + ... + 52453.

It is an arithmetic number, because the mean of its divisors is an integer number (343940878).

Almost surely, 2^1375684831 is an apocalyptic number.

1375684831 is the 52453-rd triangular number and also the 26227-th hexagonal number.

1375684831 is the 17485-th centered nonagonal number.

1375684831 is a deficient number, since it is larger than the sum of its proper divisors (78681).

1375684831 is an equidigital number, since it uses as much as digits as its factorization.

1375684831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78680.

The product of its digits is 483840, while the sum is 46.

The square root of 1375684831 is about 37090.2255452835. The cubic root of 1375684831 is about 1112.1746268268.

Subtracting 1375684831 from its reverse (1384865731), we obtain a square (9180900 = 3030²).

It can be divided in two parts, 1375 and 684831, that added together give a triangular number (686206 = T₁₁₇₁).

The spelling of 1375684831 in words is "one billion, three hundred seventy-five million, six hundred eighty-four thousand, eight hundred thirty-one".