636123325 has 12 divisors (see below), whose sum is σ = 830308960. Its totient is φ = 482114160.

The previous prime is 636123269. The next prime is 636123329. The reversal of 636123325 is 523321636.

It is a happy number.

It is not a de Polignac number, because 636123325 - 2¹⁵ = 636090557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (636123329) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 669129 + ... + 670078.

Almost surely, 2^636123325 is an apocalyptic number.

It is an amenable number.

636123325 is a deficient number, since it is larger than the sum of its proper divisors (194185635).

636123325 is a wasteful number, since it uses less digits than its factorization.

636123325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1339236 (or 1339231 counting only the distinct ones).

The product of its digits is 19440, while the sum is 31.

The square root of 636123325 is about 25221.4853844892. The cubic root of 636123325 is about 860.0303419077.

The spelling of 636123325 in words is "six hundred thirty-six million, one hundred twenty-three thousand, three hundred twenty-five".