636005 has 8 divisors (see below), whose sum is σ = 769824. Its totient is φ = 504400.

The previous prime is 635989. The next prime is 636017. The reversal of 636005 is 500636.

636005 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 636005 - 2⁴ = 635989 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 170 + ... + 1140.

It is an arithmetic number, because the mean of its divisors is an integer number (96228).

2⁶³⁶⁰⁰⁵ is an apocalyptic number.

It is an amenable number.

636005 is a deficient number, since it is larger than the sum of its proper divisors (133819).

636005 is a wasteful number, since it uses less digits than its factorization.

636005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1107.

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 636005 is about 797.4992163006. The cubic root of 636005 is about 85.9977013988.

The spelling of 636005 in words is "six hundred thirty-six thousand, five".