636970 has 8 divisors (see below), whose sum is σ = 1146564. Its totient is φ = 254784.

The previous prime is 636967. The next prime is 636983. The reversal of 636970 is 79636.

It can be written as a sum of positive squares in 2 ways, for example, as 558009 + 78961 = 747^2 + 281^2 .

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

It is an Ulam number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 636970.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31839 + ... + 31858.

2⁶³⁶⁹⁷⁰ is an apocalyptic number.

636970 is a deficient number, since it is larger than the sum of its proper divisors (509594).

636970 is a wasteful number, since it uses less digits than its factorization.

636970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63704.

The product of its (nonzero) digits is 6804, while the sum is 31.

The square root of 636970 is about 798.1040032477. The cubic root of 636970 is about 86.0411737222.

The spelling of 636970 in words is "six hundred thirty-six thousand, nine hundred seventy".