64606513 has 2 divisors, whose sum is σ = 64606514. Its totient is φ = 64606512.

The previous prime is 64606501. The next prime is 64606541. The reversal of 64606513 is 31560646.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63872064 + 734449 = 7992^2 + 857^2 .

It is a cyclic number.

It is not a de Polignac number, because 64606513 - 2⁵ = 64606481 is a prime.

It is not a weakly prime, because it can be changed into another prime (64606583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32303256 + 32303257.

It is an arithmetic number, because the mean of its divisors is an integer number (32303257).

Almost surely, 2^64606513 is an apocalyptic number.

It is an amenable number.

64606513 is a deficient number, since it is larger than the sum of its proper divisors (1).

64606513 is an equidigital number, since it uses as much as digits as its factorization.

64606513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 64606513 is about 8037.8176764592. The cubic root of 64606513 is about 401.2595981180.

The spelling of 64606513 in words is "sixty-four million, six hundred six thousand, five hundred thirteen".