634297927931 has 4 divisors (see below), whose sum is σ = 634333454832. Its totient is φ = 634262401032.

The previous prime is 634297927927. The next prime is 634297927969. The reversal of 634297927931 is 139729792436.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 634297927931 - 2² = 634297927927 is a prime.

It is a super-2 number, since 2×634297927931² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (634297927981) 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, 17736656 + ... + 17772381.

It is an arithmetic number, because the mean of its divisors is an integer number (158583363708).

Almost surely, 2^634297927931 is an apocalyptic number.

634297927931 is a deficient number, since it is larger than the sum of its proper divisors (35526901).

634297927931 is a wasteful number, since it uses less digits than its factorization.

634297927931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35526900.

The product of its digits is 30862944, while the sum is 62.

The spelling of 634297927931 in words is "six hundred thirty-four billion, two hundred ninety-seven million, nine hundred twenty-seven thousand, nine hundred thirty-one".