636343023 has 4 divisors (see below), whose sum is σ = 848457368. Its totient is φ = 424228680.

The previous prime is 636343013. The next prime is 636343061. The reversal of 636343023 is 320343636.

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

It is not a de Polignac number, because 636343023 - 2¹⁷ = 636211951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (636343013) 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, 106057168 + ... + 106057173.

It is an arithmetic number, because the mean of its divisors is an integer number (212114342).

Almost surely, 2^636343023 is an apocalyptic number.

636343023 is a deficient number, since it is larger than the sum of its proper divisors (212114345).

636343023 is a wasteful number, since it uses less digits than its factorization.

636343023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212114344.

The product of its (nonzero) digits is 23328, while the sum is 30.

The square root of 636343023 is about 25225.8403824332. The cubic root of 636343023 is about 860.1293401106.

Adding to 636343023 its reverse (320343636), we get a palindrome (956686659).

The spelling of 636343023 in words is "six hundred thirty-six million, three hundred forty-three thousand, twenty-three".