636934243 has 8 divisors (see below), whose sum is σ = 713617200. Its totient is φ = 563381280.

The previous prime is 636934237. The next prime is 636934289. The reversal of 636934243 is 342439636.

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

It is not a de Polignac number, because 636934243 - 2²⁹ = 100063331 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 636934196 and 636934205.

It is not an unprimeable number, because it can be changed into a prime (636934213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 782068 + ... + 782881.

It is an arithmetic number, because the mean of its divisors is an integer number (89202150).

Almost surely, 2^636934243 is an apocalyptic number.

636934243 is a deficient number, since it is larger than the sum of its proper divisors (76682957).

636934243 is a wasteful number, since it uses less digits than its factorization.

636934243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1564997.

The product of its digits is 279936, while the sum is 40.

The square root of 636934243 is about 25237.5562010271. The cubic root of 636934243 is about 860.3956368733.

The spelling of 636934243 in words is "six hundred thirty-six million, nine hundred thirty-four thousand, two hundred forty-three".