633969 has 24 divisors (see below), whose sum is σ = 1085760. Its totient is φ = 348768.

The previous prime is 633967. The next prime is 633991. The reversal of 633969 is 969336.

633969 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 633969 - 2¹ = 633967 is a prime.

It is a super-2 number, since 2×633969² = 803833385922, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (633961) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1654 + ... + 2000.

It is an arithmetic number, because the mean of its divisors is an integer number (45240).

2⁶³³⁹⁶⁹ is an apocalyptic number.

It is an amenable number.

633969 is a deficient number, since it is larger than the sum of its proper divisors (451791).

633969 is a wasteful number, since it uses less digits than its factorization.

633969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389 (or 386 counting only the distinct ones).

The product of its digits is 26244, while the sum is 36.

The square root of 633969 is about 796.2217027939. The cubic root of 633969 is about 85.9058370848.

It can be divided in two parts, 63 and 3969, that multiplied together give a cube (250047 = 63³).

The spelling of 633969 in words is "six hundred thirty-three thousand, nine hundred sixty-nine".