257663123 has 8 divisors (see below), whose sum is σ = 272035920. Its totient is φ = 243371520.

The previous prime is 257663111. The next prime is 257663129. The reversal of 257663123 is 321366752.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 257663123 - 2¹² = 257659027 is a prime.

It is a super-2 number, since 2×257663123² = 132780569908226258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (257663129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13718 + ... + 26523.

It is an arithmetic number, because the mean of its divisors is an integer number (34004490).

Almost surely, 2^257663123 is an apocalyptic number.

257663123 is a deficient number, since it is larger than the sum of its proper divisors (14372797).

257663123 is a wasteful number, since it uses less digits than its factorization.

257663123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40597.

The product of its digits is 45360, while the sum is 35.

The square root of 257663123 is about 16051.8884558796. Note that the first 3 decimals coincide. The cubic root of 257663123 is about 636.3324763425.

The spelling of 257663123 in words is "two hundred fifty-seven million, six hundred sixty-three thousand, one hundred twenty-three".