1316840631 has 4 divisors (see below), whose sum is σ = 1755787512. Its totient is φ = 877893752.

The previous prime is 1316840593. The next prime is 1316840639. The reversal of 1316840631 is 1360486131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1360486131 = 3 ⋅453495377.

It is a cyclic number.

It is not a de Polignac number, because 1316840631 - 2¹⁴ = 1316824247 is a prime.

It is a super-2 number, since 2×1316840631² = 3468138494904956322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1316840592 and 1316840601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1316840639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 219473436 + ... + 219473441.

It is an arithmetic number, because the mean of its divisors is an integer number (438946878).

Almost surely, 2^1316840631 is an apocalyptic number.

1316840631 is a deficient number, since it is larger than the sum of its proper divisors (438946881).

1316840631 is an equidigital number, since it uses as much as digits as its factorization.

1316840631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438946880.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 1316840631 is about 36288.2988165607. The cubic root of 1316840631 is about 1096.0854331502.

The spelling of 1316840631 in words is "one billion, three hundred sixteen million, eight hundred forty thousand, six hundred thirty-one".