636342789 has 16 divisors (see below), whose sum is σ = 876997440. Its totient is φ = 410194560.

The previous prime is 636342787. The next prime is 636342821. The reversal of 636342789 is 987243636.

636342789 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 636342789 - 2¹ = 636342787 is a prime.

It is a super-2 number, since 2×636342789² = 809864290224597042, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (636342787) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18672 + ... + 40265.

It is an arithmetic number, because the mean of its divisors is an integer number (54812340).

Almost surely, 2^636342789 is an apocalyptic number.

It is an amenable number.

636342789 is a deficient number, since it is larger than the sum of its proper divisors (240654651).

636342789 is a wasteful number, since it uses less digits than its factorization.

636342789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59060.

The product of its digits is 1306368, while the sum is 48.

The square root of 636342789 is about 25225.8357443316. The cubic root of 636342789 is about 860.1292346799.

The spelling of 636342789 in words is "six hundred thirty-six million, three hundred forty-two thousand, seven hundred eighty-nine".