257169623 has 2 divisors, whose sum is σ = 257169624. Its totient is φ = 257169622.

The previous prime is 257169551. The next prime is 257169631. The reversal of 257169623 is 326961752.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 257169623 - 2¹⁰ = 257168599 is a prime.

It is a super-2 number, since 2×257169623² = 132272429987924258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (257169643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128584811 + 128584812.

It is an arithmetic number, because the mean of its divisors is an integer number (128584812).

Almost surely, 2^257169623 is an apocalyptic number.

257169623 is a deficient number, since it is larger than the sum of its proper divisors (1).

257169623 is an equidigital number, since it uses as much as digits as its factorization.

257169623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 136080, while the sum is 41.

The square root of 257169623 is about 16036.5090652548. The cubic root of 257169623 is about 635.9259626314.

The spelling of 257169623 in words is "two hundred fifty-seven million, one hundred sixty-nine thousand, six hundred twenty-three".