64931593 has 2 divisors, whose sum is σ = 64931594. Its totient is φ = 64931592.

The previous prime is 64931543. The next prime is 64931611. The reversal of 64931593 is 39513946.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33212169 + 31719424 = 5763^2 + 5632^2 .

It is a cyclic number.

It is not a de Polignac number, because 64931593 - 2²⁵ = 31377161 is a prime.

It is a super-2 number, since 2×64931593² = 8432223539035298, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (64931533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32465796 + 32465797.

It is an arithmetic number, because the mean of its divisors is an integer number (32465797).

Almost surely, 2^64931593 is an apocalyptic number.

It is an amenable number.

64931593 is a deficient number, since it is larger than the sum of its proper divisors (1).

64931593 is an equidigital number, since it uses as much as digits as its factorization.

64931593 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 87480, while the sum is 40.

The square root of 64931593 is about 8058.0142094687. The cubic root of 64931593 is about 401.9314772277.

The spelling of 64931593 in words is "sixty-four million, nine hundred thirty-one thousand, five hundred ninety-three".