636004013 has 16 divisors (see below), whose sum is σ = 676190592. Its totient is φ = 597408000.

The previous prime is 636004003. The next prime is 636004049. The reversal of 636004013 is 310400636.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-636004013 is a prime.

It is a super-2 number, since 2×636004013² = 809002209104208338, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 636004013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (636004003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122633 + ... + 127713.

It is an arithmetic number, because the mean of its divisors is an integer number (42261912).

Almost surely, 2^636004013 is an apocalyptic number.

It is an amenable number.

636004013 is a deficient number, since it is larger than the sum of its proper divisors (40186579).

636004013 is a wasteful number, since it uses less digits than its factorization.

636004013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5236.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 636004013 is about 25219.1199886118. The cubic root of 636004013 is about 859.9765691291.

Adding to 636004013 its reverse (310400636), we get a palindrome (946404649).

The spelling of 636004013 in words is "six hundred thirty-six million, four thousand, thirteen".