257417423 has 2 divisors, whose sum is σ = 257417424. Its totient is φ = 257417422.

The previous prime is 257417341. The next prime is 257417477. The reversal of 257417423 is 324714752.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 257417423 - 2¹² = 257413327 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (257417023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128708711 + 128708712.

It is an arithmetic number, because the mean of its divisors is an integer number (128708712).

Almost surely, 2^257417423 is an apocalyptic number.

257417423 is a deficient number, since it is larger than the sum of its proper divisors (1).

257417423 is an equidigital number, since it uses as much as digits as its factorization.

257417423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47040, while the sum is 35.

The square root of 257417423 is about 16044.2333254039. The cubic root of 257417423 is about 636.1301493533.

The spelling of 257417423 in words is "two hundred fifty-seven million, four hundred seventeen thousand, four hundred twenty-three".