64496931 has 4 divisors (see below), whose sum is σ = 85995912. Its totient is φ = 42997952.

The previous prime is 64496909. The next prime is 64496941. The reversal of 64496931 is 13969446.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64496931 is a prime.

It is a super-2 number, since 2×64496931² = 8319708216837522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64496941) 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, 10749486 + ... + 10749491.

It is an arithmetic number, because the mean of its divisors is an integer number (21498978).

Almost surely, 2^64496931 is an apocalyptic number.

64496931 is a deficient number, since it is larger than the sum of its proper divisors (21498981).

64496931 is a wasteful number, since it uses less digits than its factorization.

64496931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21498980.

The product of its digits is 139968, while the sum is 42.

The square root of 64496931 is about 8030.9981322374. The cubic root of 64496931 is about 401.0326049404.

The spelling of 64496931 in words is "sixty-four million, four hundred ninety-six thousand, nine hundred thirty-one".