264297557 has 2 divisors, whose sum is σ = 264297558. Its totient is φ = 264297556.

The previous prime is 264297499. The next prime is 264297613. The reversal of 264297557 is 755792462.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 212255761 + 52041796 = 14569^2 + 7214^2 .

It is a cyclic number.

It is not a de Polignac number, because 264297557 - 2⁶ = 264297493 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (264297457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132148778 + 132148779.

It is an arithmetic number, because the mean of its divisors is an integer number (132148779).

Almost surely, 2^264297557 is an apocalyptic number.

It is an amenable number.

264297557 is a deficient number, since it is larger than the sum of its proper divisors (1).

264297557 is an equidigital number, since it uses as much as digits as its factorization.

264297557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1058400, while the sum is 47.

The square root of 264297557 is about 16257.2309142732. The cubic root of 264297557 is about 641.7477917407.

The spelling of 264297557 in words is "two hundred sixty-four million, two hundred ninety-seven thousand, five hundred fifty-seven".