634657023 has 72 divisors (see below), whose sum is σ = 1237841280. Its totient is φ = 304274880.

The previous prime is 634657013. The next prime is 634657043. The reversal of 634657023 is 320756436.

634657023 is a `hidden beast` number, since 63 + 4 + 6 + 570 + 23 = 666.

It is not a de Polignac number, because 634657023 - 2⁵ = 634656991 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634657003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 114408 + ... + 119826.

It is an arithmetic number, because the mean of its divisors is an integer number (17192240).

Almost surely, 2^634657023 is an apocalyptic number.

634657023 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

634657023 is a deficient number, since it is larger than the sum of its proper divisors (603184257).

634657023 is a wasteful number, since it uses less digits than its factorization.

634657023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5469 (or 5453 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 36.

The square root of 634657023 is about 25192.4001039996. The cubic root of 634657023 is about 859.3690265379.

The spelling of 634657023 in words is "six hundred thirty-four million, six hundred fifty-seven thousand, twenty-three".