633998 has 16 divisors (see below), whose sum is σ = 1043280. Its totient is φ = 287616.

The previous prime is 633991. The next prime is 634003. The reversal of 633998 is 899336.

It is a happy number.

633998 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (633991) 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, 665 + ... + 1307.

It is an arithmetic number, because the mean of its divisors is an integer number (65205).

2⁶³³⁹⁹⁸ is an apocalyptic number.

633998 is a deficient number, since it is larger than the sum of its proper divisors (409282).

633998 is a wasteful number, since it uses less digits than its factorization.

633998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691.

The product of its digits is 34992, while the sum is 38.

The square root of 633998 is about 796.2399135939. The cubic root of 633998 is about 85.9071469445.

The spelling of 633998 in words is "six hundred thirty-three thousand, nine hundred ninety-eight".