636243241 has 8 divisors (see below), whose sum is σ = 674801064. Its totient is φ = 597811200.

The previous prime is 636243233. The next prime is 636243269. The reversal of 636243241 is 142342636.

636243241 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 236083225 + 400160016 = 15365^2 + 20004^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 636243241 - 2³ = 636243233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (636243211) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20920 + ... + 41353.

It is an arithmetic number, because the mean of its divisors is an integer number (84350133).

Almost surely, 2^636243241 is an apocalyptic number.

It is an amenable number.

636243241 is a deficient number, since it is larger than the sum of its proper divisors (38557823).

636243241 is a wasteful number, since it uses less digits than its factorization.

636243241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62891.

The product of its digits is 20736, while the sum is 31.

The square root of 636243241 is about 25223.8625313412. The cubic root of 636243241 is about 860.0843801288.

Adding to 636243241 its reverse (142342636), we get a palindrome (778585877).

The spelling of 636243241 in words is "six hundred thirty-six million, two hundred forty-three thousand, two hundred forty-one".