257793071 has 2 divisors, whose sum is σ = 257793072. Its totient is φ = 257793070.

The previous prime is 257793059. The next prime is 257793077. The reversal of 257793071 is 170397752.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 257793071 - 2¹⁸ = 257530927 is a prime.

It is a super-2 number, since 2×257793071² = 132914534911222082, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (257793077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128896535 + 128896536.

It is an arithmetic number, because the mean of its divisors is an integer number (128896536).

Almost surely, 2^257793071 is an apocalyptic number.

257793071 is a deficient number, since it is larger than the sum of its proper divisors (1).

257793071 is an equidigital number, since it uses as much as digits as its factorization.

257793071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 92610, while the sum is 41.

The square root of 257793071 is about 16055.9356936928. The cubic root of 257793071 is about 636.4394328399.

The spelling of 257793071 in words is "two hundred fifty-seven million, seven hundred ninety-three thousand, seventy-one".