636317139 has 8 divisors (see below), whose sum is σ = 868153792. Its totient is φ = 414345960.

The previous prime is 636317137. The next prime is 636317177. The reversal of 636317139 is 931713636.

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

It is not a de Polignac number, because 636317139 - 2¹ = 636317137 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 636317097 and 636317106.

It is not an unprimeable number, because it can be changed into a prime (636317137) 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 7 ways as a sum of consecutive naturals, for example, 2466217 + ... + 2466474.

It is an arithmetic number, because the mean of its divisors is an integer number (108519224).

Almost surely, 2^636317139 is an apocalyptic number.

636317139 is a deficient number, since it is larger than the sum of its proper divisors (231836653).

636317139 is a wasteful number, since it uses less digits than its factorization.

636317139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4932737.

The product of its digits is 61236, while the sum is 39.

The square root of 636317139 is about 25225.3273318702. The cubic root of 636317139 is about 860.1176776953.

The spelling of 636317139 in words is "six hundred thirty-six million, three hundred seventeen thousand, one hundred thirty-nine".