257577323 has 2 divisors, whose sum is σ = 257577324. Its totient is φ = 257577322.

The previous prime is 257577311. The next prime is 257577329. The reversal of 257577323 is 323775752.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 257577323 - 2¹² = 257573227 is a prime.

It is not a weakly prime, because it can be changed into another prime (257577329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128788661 + 128788662.

It is an arithmetic number, because the mean of its divisors is an integer number (128788662).

Almost surely, 2^257577323 is an apocalyptic number.

257577323 is a deficient number, since it is larger than the sum of its proper divisors (1).

257577323 is an equidigital number, since it uses as much as digits as its factorization.

257577323 is an evil number, because the sum of its binary digits is even.

The product of its digits is 308700, while the sum is 41.

The square root of 257577323 is about 16049.2156506167. The cubic root of 257577323 is about 636.2618370945.

The spelling of 257577323 in words is "two hundred fifty-seven million, five hundred seventy-seven thousand, three hundred twenty-three".