636607 has 4 divisors (see below), whose sum is σ = 652176. Its totient is φ = 621040.

The previous prime is 636569. The next prime is 636613. The reversal of 636607 is 706636.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-636607 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (636697) 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, 7723 + ... + 7804.

It is an arithmetic number, because the mean of its divisors is an integer number (163044).

2⁶³⁶⁶⁰⁷ is an apocalyptic number.

636607 is a deficient number, since it is larger than the sum of its proper divisors (15569).

636607 is a wasteful number, since it uses less digits than its factorization.

636607 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15568.

The product of its (nonzero) digits is 4536, while the sum is 28.

The square root of 636607 is about 797.8765568683. The cubic root of 636607 is about 86.0248260758.

It can be divided in two parts, 63 and 6607, that added together give a triangular number (6670 = T₁₁₅).

The spelling of 636607 in words is "six hundred thirty-six thousand, six hundred seven".