633679 has 4 divisors (see below), whose sum is σ = 655560. Its totient is φ = 611800.

The previous prime is 633667. The next prime is 633739. The reversal of 633679 is 976336.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 633679 - 2¹⁹ = 109391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (633629) 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, 10897 + ... + 10954.

It is an arithmetic number, because the mean of its divisors is an integer number (163890).

2⁶³³⁶⁷⁹ is an apocalyptic number.

633679 is a deficient number, since it is larger than the sum of its proper divisors (21881).

633679 is a wasteful number, since it uses less digits than its factorization.

633679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21880.

The product of its digits is 20412, while the sum is 34.

The square root of 633679 is about 796.0395718807. The cubic root of 633679 is about 85.8927362905.

The spelling of 633679 in words is "six hundred thirty-three thousand, six hundred seventy-nine".