636326397 has 72 divisors (see below), whose sum is σ = 1133246400. Its totient is φ = 343874160.

The previous prime is 636326363. The next prime is 636326399. The reversal of 636326397 is 793623636.

636326397 is a `hidden beast` number, since 6 + 3 + 6 + 3 + 2 + 639 + 7 = 666.

It is not a de Polignac number, because 636326397 - 2¹⁶ = 636260861 is a prime.

It is a super-2 number, since 2×636326397² = 809822567038003218, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (636326399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1114122 + ... + 1114692.

Almost surely, 2^636326397 is an apocalyptic number.

It is an amenable number.

636326397 is a deficient number, since it is larger than the sum of its proper divisors (496920003).

636326397 is a wasteful number, since it uses less digits than its factorization.

636326397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 636 (or 600 counting only the distinct ones).

The product of its digits is 734832, while the sum is 45.

The square root of 636326397 is about 25225.5108372457. The cubic root of 636326397 is about 860.1218490591.

The spelling of 636326397 in words is "six hundred thirty-six million, three hundred twenty-six thousand, three hundred ninety-seven".