258064657 has 2 divisors, whose sum is σ = 258064658. Its totient is φ = 258064656.

The previous prime is 258064627. The next prime is 258064661. The reversal of 258064657 is 756460852.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 196112016 + 61952641 = 14004^2 + 7871^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-258064657 is a prime.

It is not a weakly prime, because it can be changed into another prime (258064627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129032328 + 129032329.

It is an arithmetic number, because the mean of its divisors is an integer number (129032329).

Almost surely, 2^258064657 is an apocalyptic number.

It is an amenable number.

258064657 is a deficient number, since it is larger than the sum of its proper divisors (1).

258064657 is an equidigital number, since it uses as much as digits as its factorization.

258064657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 403200, while the sum is 43.

The square root of 258064657 is about 16064.3909626229. The cubic root of 258064657 is about 636.6628515376.

The spelling of 258064657 in words is "two hundred fifty-eight million, sixty-four thousand, six hundred fifty-seven".