257106923 has 2 divisors, whose sum is σ = 257106924. Its totient is φ = 257106922.

The previous prime is 257106919. The next prime is 257106931. The reversal of 257106923 is 329601752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 257106923 - 2² = 257106919 is a prime.

It is a super-2 number, since 2×257106923² = 132207939709055858, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (257106943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128553461 + 128553462.

It is an arithmetic number, because the mean of its divisors is an integer number (128553462).

Almost surely, 2^257106923 is an apocalyptic number.

257106923 is a deficient number, since it is larger than the sum of its proper divisors (1).

257106923 is an equidigital number, since it uses as much as digits as its factorization.

257106923 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 257106923 is about 16034.5540318401. The cubic root of 257106923 is about 635.8742771611.

The spelling of 257106923 in words is "two hundred fifty-seven million, one hundred six thousand, nine hundred twenty-three".