636230431 has 2 divisors, whose sum is σ = 636230432. Its totient is φ = 636230430.

The previous prime is 636230417. The next prime is 636230467. The reversal of 636230431 is 134032636.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 636230431 - 2⁷ = 636230303 is a prime.

It is a super-2 number, since 2×636230431² = 809578322660891522, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 636230431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (636233431) 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 as a sum of consecutive naturals, namely, 318115215 + 318115216.

It is an arithmetic number, because the mean of its divisors is an integer number (318115216).

Almost surely, 2^636230431 is an apocalyptic number.

636230431 is a deficient number, since it is larger than the sum of its proper divisors (1).

636230431 is an equidigital number, since it uses as much as digits as its factorization.

636230431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 28.

The square root of 636230431 is about 25223.6086038457. The cubic root of 636230431 is about 860.0786078318.

The spelling of 636230431 in words is "six hundred thirty-six million, two hundred thirty thousand, four hundred thirty-one".