64325813 has 2 divisors, whose sum is σ = 64325814. Its totient is φ = 64325812.

The previous prime is 64325809. The next prime is 64325827. The reversal of 64325813 is 31852346.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63648484 + 677329 = 7978^2 + 823^2 .

It is a cyclic number.

It is not a de Polignac number, because 64325813 - 2² = 64325809 is a prime.

It is a super-2 number, since 2×64325813² = 8275620436221938, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64325813.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64325803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32162906 + 32162907.

It is an arithmetic number, because the mean of its divisors is an integer number (32162907).

Almost surely, 2^64325813 is an apocalyptic number.

It is an amenable number.

64325813 is a deficient number, since it is larger than the sum of its proper divisors (1).

64325813 is an equidigital number, since it uses as much as digits as its factorization.

64325813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 32.

The square root of 64325813 is about 8020.3374617282. The cubic root of 64325813 is about 400.6776284842.

The spelling of 64325813 in words is "sixty-four million, three hundred twenty-five thousand, eight hundred thirteen".