64256317 has 2 divisors, whose sum is σ = 64256318. Its totient is φ = 64256316.

The previous prime is 64256281. The next prime is 64256321. The reversal of 64256317 is 71365246.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63059481 + 1196836 = 7941^2 + 1094^2 .

It is a cyclic number.

It is not a de Polignac number, because 64256317 - 2¹¹ = 64254269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64256327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32128158 + 32128159.

It is an arithmetic number, because the mean of its divisors is an integer number (32128159).

Almost surely, 2^64256317 is an apocalyptic number.

It is an amenable number.

64256317 is a deficient number, since it is larger than the sum of its proper divisors (1).

64256317 is an equidigital number, since it uses as much as digits as its factorization.

64256317 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 34.

The square root of 64256317 is about 8016.0038048893. The cubic root of 64256317 is about 400.5332824586.

The spelling of 64256317 in words is "sixty-four million, two hundred fifty-six thousand, three hundred seventeen".