257879 has 2 divisors, whose sum is σ = 257880. Its totient is φ = 257878.

The previous prime is 257869. The next prime is 257893. The reversal of 257879 is 978752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 257879 - 2⁴ = 257863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (257869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128939 + 128940.

It is an arithmetic number, because the mean of its divisors is an integer number (128940).

2²⁵⁷⁸⁷⁹ is an apocalyptic number.

257879 is a deficient number, since it is larger than the sum of its proper divisors (1).

257879 is an equidigital number, since it uses as much as digits as its factorization.

257879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35280, while the sum is 38.

The square root of 257879 is about 507.8178807407. The cubic root of 257879 is about 63.6510138812.

The spelling of 257879 in words is "two hundred fifty-seven thousand, eight hundred seventy-nine".