636497 has 4 divisors (see below), whose sum is σ = 673956. Its totient is φ = 599040.

The previous prime is 636473. The next prime is 636499. The reversal of 636497 is 794636.

636497 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 421201 + 215296 = 649^2 + 464^2 .

It is a cyclic number.

It is not a de Polignac number, because 636497 - 2⁸ = 636241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (636499) 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, 18704 + ... + 18737.

It is an arithmetic number, because the mean of its divisors is an integer number (168489).

2⁶³⁶⁴⁹⁷ is an apocalyptic number.

It is an amenable number.

636497 is a deficient number, since it is larger than the sum of its proper divisors (37459).

636497 is a wasteful number, since it uses less digits than its factorization.

636497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37458.

The product of its digits is 27216, while the sum is 35.

The square root of 636497 is about 797.8076209212. The cubic root of 636497 is about 86.0198710167.

The spelling of 636497 in words is "six hundred thirty-six thousand, four hundred ninety-seven".