633979131 has 8 divisors (see below), whose sum is σ = 859632960. Its totient is φ = 415489032.

The previous prime is 633979117. The next prime is 633979133. The reversal of 633979131 is 131979336.

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

It is not a de Polignac number, because 633979131 - 2¹⁸ = 633716987 is a prime.

It is a super-2 number, since 2×633979131² = 803859077087030322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (633979133) 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, 1790725 + ... + 1791078.

It is an arithmetic number, because the mean of its divisors is an integer number (107454120).

Almost surely, 2^633979131 is an apocalyptic number.

633979131 is a deficient number, since it is larger than the sum of its proper divisors (225653829).

633979131 is a wasteful number, since it uses less digits than its factorization.

633979131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3581865.

The product of its digits is 91854, while the sum is 42.

The square root of 633979131 is about 25178.9422136832. The cubic root of 633979131 is about 859.0629468206.

The spelling of 633979131 in words is "six hundred thirty-three million, nine hundred seventy-nine thousand, one hundred thirty-one".