64517923 has 2 divisors, whose sum is σ = 64517924. Its totient is φ = 64517922.

The previous prime is 64517909. The next prime is 64517963. The reversal of 64517923 is 32971546.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64517923 is a prime.

It is not a weakly prime, because it can be changed into another prime (64517903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32258961 + 32258962.

It is an arithmetic number, because the mean of its divisors is an integer number (32258962).

Almost surely, 2^64517923 is an apocalyptic number.

64517923 is a deficient number, since it is larger than the sum of its proper divisors (1).

64517923 is an equidigital number, since it uses as much as digits as its factorization.

64517923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45360, while the sum is 37.

The square root of 64517923 is about 8032.3049618400. The cubic root of 64517923 is about 401.0761086294.

The spelling of 64517923 in words is "sixty-four million, five hundred seventeen thousand, nine hundred twenty-three".