257074379 has 2 divisors, whose sum is σ = 257074380. Its totient is φ = 257074378.

The previous prime is 257074373. The next prime is 257074397. The reversal of 257074379 is 973470752.

Together with next prime (257074397) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 257074379 - 2¹² = 257070283 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (257074373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128537189 + 128537190.

It is an arithmetic number, because the mean of its divisors is an integer number (128537190).

Almost surely, 2^257074379 is an apocalyptic number.

257074379 is a deficient number, since it is larger than the sum of its proper divisors (1).

257074379 is an equidigital number, since it uses as much as digits as its factorization.

257074379 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 370440, while the sum is 44.

The square root of 257074379 is about 16033.5391913326. The cubic root of 257074379 is about 635.8474468637.

The spelling of 257074379 in words is "two hundred fifty-seven million, seventy-four thousand, three hundred seventy-nine".