257672323 has 2 divisors, whose sum is σ = 257672324. Its totient is φ = 257672322.

The previous prime is 257672321. The next prime is 257672339. The reversal of 257672323 is 323276752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 257672323 - 2¹ = 257672321 is a prime.

Together with 257672321, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (257672321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128836161 + 128836162.

It is an arithmetic number, because the mean of its divisors is an integer number (128836162).

Almost surely, 2^257672323 is an apocalyptic number.

257672323 is a deficient number, since it is larger than the sum of its proper divisors (1).

257672323 is an equidigital number, since it uses as much as digits as its factorization.

257672323 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 105840, while the sum is 37.

The square root of 257672323 is about 16052.1750239648. The cubic root of 257672323 is about 636.3400497832.

The spelling of 257672323 in words is "two hundred fifty-seven million, six hundred seventy-two thousand, three hundred twenty-three".