257796613 has 2 divisors, whose sum is σ = 257796614. Its totient is φ = 257796612.

The previous prime is 257796593. The next prime is 257796629. The reversal of 257796613 is 316697752.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 142491969 + 115304644 = 11937^2 + 10738^2 .

It is a cyclic number.

It is not a de Polignac number, because 257796613 - 2²¹ = 255699461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (257796683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128898306 + 128898307.

It is an arithmetic number, because the mean of its divisors is an integer number (128898307).

Almost surely, 2^257796613 is an apocalyptic number.

It is an amenable number.

257796613 is a deficient number, since it is larger than the sum of its proper divisors (1).

257796613 is an equidigital number, since it uses as much as digits as its factorization.

257796613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 476280, while the sum is 46.

The square root of 257796613 is about 16056.0459952007. The cubic root of 257796613 is about 636.4423476559.

The spelling of 257796613 in words is "two hundred fifty-seven million, seven hundred ninety-six thousand, six hundred thirteen".