1375918647 has 8 divisors (see below), whose sum is σ = 1942473456. Its totient is φ = 863321472.

The previous prime is 1375918619. The next prime is 1375918693. The reversal of 1375918647 is 7468195731.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1375918647 - 2¹⁴ = 1375902263 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51), and also a Moran number because the ratio is a prime number: 26978797 = 1375918647 / (1 + 3 + 7 + 5 + 9 + 1 + 8 + 6 + 4 + 7).

It is a self number, because there is not a number n which added to its sum of digits gives 1375918647.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1375918147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13489348 + ... + 13489449.

It is an arithmetic number, because the mean of its divisors is an integer number (242809182).

Almost surely, 2^1375918647 is an apocalyptic number.

1375918647 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

1375918647 is a deficient number, since it is larger than the sum of its proper divisors (566554809).

1375918647 is a wasteful number, since it uses less digits than its factorization.

1375918647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26978817.

The product of its digits is 1270080, while the sum is 51.

The square root of 1375918647 is about 37093.3774008245. The cubic root of 1375918647 is about 1112.2376328985.

The spelling of 1375918647 in words is "one billion, three hundred seventy-five million, nine hundred eighteen thousand, six hundred forty-seven".