636797 has 4 divisors (see below), whose sum is σ = 727776. Its totient is φ = 545820.

The previous prime is 636781. The next prime is 636809. The reversal of 636797 is 797636.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 636797 - 2⁴ = 636781 is a prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 636797.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (636697) 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, 45479 + ... + 45492.

It is an arithmetic number, because the mean of its divisors is an integer number (181944).

2⁶³⁶⁷⁹⁷ is an apocalyptic number.

It is an amenable number.

636797 is a deficient number, since it is larger than the sum of its proper divisors (90979).

636797 is an equidigital number, since it uses as much as digits as its factorization.

636797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90978.

The product of its digits is 47628, while the sum is 38.

The square root of 636797 is about 797.9956140230. The cubic root of 636797 is about 86.0333834700.

The spelling of 636797 in words is "six hundred thirty-six thousand, seven hundred ninety-seven".