64923913 has 2 divisors, whose sum is σ = 64923914. Its totient is φ = 64923912.

The previous prime is 64923899. The next prime is 64923941. The reversal of 64923913 is 31932946.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62141689 + 2782224 = 7883^2 + 1668^2 .

It is a cyclic number.

It is not a de Polignac number, because 64923913 - 2²¹ = 62826761 is a prime.

It is a super-2 number, since 2×64923913² = 8430228958463138, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (64923983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32461956 + 32461957.

It is an arithmetic number, because the mean of its divisors is an integer number (32461957).

Almost surely, 2^64923913 is an apocalyptic number.

It is an amenable number.

64923913 is a deficient number, since it is larger than the sum of its proper divisors (1).

64923913 is an equidigital number, since it uses as much as digits as its factorization.

64923913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34992, while the sum is 37.

The square root of 64923913 is about 8057.5376511686. The cubic root of 64923913 is about 401.9156300090.

The spelling of 64923913 in words is "sixty-four million, nine hundred twenty-three thousand, nine hundred thirteen".