634988601 has 36 divisors (see below), whose sum is σ = 1012055148. Its totient is φ = 383340672.

The previous prime is 634988597. The next prime is 634988603. The reversal of 634988601 is 106889436.

634988601 is a `hidden beast` number, since 6 + 34 + 9 + 8 + 8 + 601 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 129413376 + 505575225 = 11376^2 + 22485^2 .

It is not a de Polignac number, because 634988601 - 2² = 634988597 is a prime.

It is not an unprimeable number, because it can be changed into a prime (634988603) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 76675 + ... + 84551.

It is an arithmetic number, because the mean of its divisors is an integer number (28112643).

Almost surely, 2^634988601 is an apocalyptic number.

It is an amenable number.

634988601 is a deficient number, since it is larger than the sum of its proper divisors (377066547).

634988601 is a wasteful number, since it uses less digits than its factorization.

634988601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7962 (or 7946 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The square root of 634988601 is about 25198.9801579350. The cubic root of 634988601 is about 859.5186602472.

The spelling of 634988601 in words is "six hundred thirty-four million, nine hundred eighty-eight thousand, six hundred one".