64913937 has 24 divisors (see below), whose sum is σ = 99669600. Its totient is φ = 37264320.

The previous prime is 64913921. The next prime is 64913957. The reversal of 64913937 is 73931946.

It is not a de Polignac number, because 64913937 - 2⁴ = 64913921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64913917) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9189 + ... + 14637.

It is an arithmetic number, because the mean of its divisors is an integer number (4152900).

Almost surely, 2^64913937 is an apocalyptic number.

It is an amenable number.

64913937 is a deficient number, since it is larger than the sum of its proper divisors (34755663).

64913937 is a wasteful number, since it uses less digits than its factorization.

64913937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5501 (or 5482 counting only the distinct ones).

The product of its digits is 122472, while the sum is 42.

The square root of 64913937 is about 8056.9185797053. The cubic root of 64913937 is about 401.8950432662.

Subtracting 64913937 from its reverse (73931946), we obtain a square (9018009 = 3003²).

The spelling of 64913937 in words is "sixty-four million, nine hundred thirteen thousand, nine hundred thirty-seven".