636422617 has 4 divisors (see below), whose sum is σ = 636852096. Its totient is φ = 635993140.

The previous prime is 636422609. The next prime is 636422701. The reversal of 636422617 is 716224636.

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 636422617 - 2³ = 636422609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (636429617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 212509 + ... + 215482.

It is an arithmetic number, because the mean of its divisors is an integer number (159213024).

Almost surely, 2^636422617 is an apocalyptic number.

It is an amenable number.

636422617 is a deficient number, since it is larger than the sum of its proper divisors (429479).

636422617 is a wasteful number, since it uses less digits than its factorization.

636422617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429478.

The product of its digits is 72576, while the sum is 37.

The square root of 636422617 is about 25227.4179614165. The cubic root of 636422617 is about 860.1652003715.

The spelling of 636422617 in words is "six hundred thirty-six million, four hundred twenty-two thousand, six hundred seventeen".