636998 has 8 divisors (see below), whose sum is σ = 968808. Its totient is φ = 314064.

The previous prime is 636997. The next prime is 637001. The reversal of 636998 is 899636.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (636997) 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, 2036 + ... + 2327.

It is an arithmetic number, because the mean of its divisors is an integer number (121101).

2⁶³⁶⁹⁹⁸ is an apocalyptic number.

636998 is a deficient number, since it is larger than the sum of its proper divisors (331810).

636998 is a wasteful number, since it uses less digits than its factorization.

636998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4438.

The product of its digits is 69984, while the sum is 41.

The square root of 636998 is about 798.1215446284. The cubic root of 636998 is about 86.0424344397.

The spelling of 636998 in words is "six hundred thirty-six thousand, nine hundred ninety-eight".