257672771 has 2 divisors, whose sum is σ = 257672772. Its totient is φ = 257672770.

The previous prime is 257672761. The next prime is 257672777. The reversal of 257672771 is 177276752.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 257672771 - 2²⁶ = 190563907 is a prime.

It is not a weakly prime, because it can be changed into another prime (257672777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128836385 + 128836386.

It is an arithmetic number, because the mean of its divisors is an integer number (128836386).

Almost surely, 2^257672771 is an apocalyptic number.

257672771 is a deficient number, since it is larger than the sum of its proper divisors (1).

257672771 is an equidigital number, since it uses as much as digits as its factorization.

257672771 is an evil number, because the sum of its binary digits is even.

The product of its digits is 288120, while the sum is 44.

The square root of 257672771 is about 16052.1889784540. The cubic root of 257672771 is about 636.3404185722.

The spelling of 257672771 in words is "two hundred fifty-seven million, six hundred seventy-two thousand, seven hundred seventy-one".