257608723 has 2 divisors, whose sum is σ = 257608724. Its totient is φ = 257608722.

The previous prime is 257608721. The next prime is 257608727. The reversal of 257608723 is 327806752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 257608723 - 2¹ = 257608721 is a prime.

Together with 257608721, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (257608721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128804361 + 128804362.

It is an arithmetic number, because the mean of its divisors is an integer number (128804362).

Almost surely, 2^257608723 is an apocalyptic number.

257608723 is a deficient number, since it is larger than the sum of its proper divisors (1).

257608723 is an equidigital number, since it uses as much as digits as its factorization.

257608723 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 141120, while the sum is 40.

The square root of 257608723 is about 16050.1938617576. The cubic root of 257608723 is about 636.2876905737.

The spelling of 257608723 in words is "two hundred fifty-seven million, six hundred eight thousand, seven hundred twenty-three".