257293259 has 2 divisors, whose sum is σ = 257293260. Its totient is φ = 257293258.

The previous prime is 257293247. The next prime is 257293331. The reversal of 257293259 is 952392752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 257293259 - 2¹² = 257289163 is a prime.

It is a super-2 number, since 2×257293259² = 132399642253682162, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (257293559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128646629 + 128646630.

It is an arithmetic number, because the mean of its divisors is an integer number (128646630).

Almost surely, 2^257293259 is an apocalyptic number.

257293259 is a deficient number, since it is larger than the sum of its proper divisors (1).

257293259 is an equidigital number, since it uses as much as digits as its factorization.

257293259 is an evil number, because the sum of its binary digits is even.

The product of its digits is 340200, while the sum is 44.

The square root of 257293259 is about 16040.3634310448. The cubic root of 257293259 is about 636.0278548445.

The spelling of 257293259 in words is "two hundred fifty-seven million, two hundred ninety-three thousand, two hundred fifty-nine".