633881 has 4 divisors (see below), whose sum is σ = 635664. Its totient is φ = 632100.

The previous prime is 633877. The next prime is 633883. The reversal of 633881 is 188336.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 633881 - 2² = 633877 is a prime.

It is a super-2 number, since 2×633881² = 803610244322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (633883) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155 + ... + 1136.

It is an arithmetic number, because the mean of its divisors is an integer number (158916).

2⁶³³⁸⁸¹ is an apocalyptic number.

It is an amenable number.

633881 is a deficient number, since it is larger than the sum of its proper divisors (1783).

633881 is a wasteful number, since it uses less digits than its factorization.

633881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1782.

The product of its digits is 3456, while the sum is 29.

The square root of 633881 is about 796.1664398855. The cubic root of 633881 is about 85.9018620937.

The spelling of 633881 in words is "six hundred thirty-three thousand, eight hundred eighty-one".