257903469 has 6 divisors (see below), whose sum is σ = 372527246. Its totient is φ = 171935640.

The previous prime is 257903449. The next prime is 257903497. The reversal of 257903469 is 964309752.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 191268900 + 66634569 = 13830^2 + 8163^2 .

It is not a de Polignac number, because 257903469 - 2¹² = 257899373 is a prime.

It is a super-2 number, since 2×257903469² = 133028398644467922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257903449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14327962 + ... + 14327979.

Almost surely, 2^257903469 is an apocalyptic number.

It is an amenable number.

257903469 is a deficient number, since it is larger than the sum of its proper divisors (114623777).

257903469 is a wasteful number, since it uses less digits than its factorization.

257903469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28655947 (or 28655944 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 45.

The square root of 257903469 is about 16059.3732443081. The cubic root of 257903469 is about 636.5302700541.

The spelling of 257903469 in words is "two hundred fifty-seven million, nine hundred three thousand, four hundred sixty-nine".