257161967 has 2 divisors, whose sum is σ = 257161968. Its totient is φ = 257161966.

The previous prime is 257161939. The next prime is 257161969. The reversal of 257161967 is 769161752.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 257161967 - 2⁸ = 257161711 is a prime.

It is a super-2 number, since 2×257161967² = 132264554542618178, which contains 22 as substring.

Together with 257161969, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (257161969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128580983 + 128580984.

It is an arithmetic number, because the mean of its divisors is an integer number (128580984).

Almost surely, 2^257161967 is an apocalyptic number.

257161967 is a deficient number, since it is larger than the sum of its proper divisors (1).

257161967 is an equidigital number, since it uses as much as digits as its factorization.

257161967 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 158760, while the sum is 44.

The square root of 257161967 is about 16036.2703581600. The cubic root of 257161967 is about 635.9196520137.

The spelling of 257161967 in words is "two hundred fifty-seven million, one hundred sixty-one thousand, nine hundred sixty-seven".