636463439 has 2 divisors, whose sum is σ = 636463440. Its totient is φ = 636463438.

The previous prime is 636463423. The next prime is 636463469. The reversal of 636463439 is 934364636.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 636463439 - 2⁴ = 636463423 is a prime.

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 636463439.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (636463469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 318231719 + 318231720.

It is an arithmetic number, because the mean of its divisors is an integer number (318231720).

Almost surely, 2^636463439 is an apocalyptic number.

636463439 is a deficient number, since it is larger than the sum of its proper divisors (1).

636463439 is an equidigital number, since it uses as much as digits as its factorization.

636463439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 839808, while the sum is 44.

The square root of 636463439 is about 25228.2270284695. The cubic root of 636463439 is about 860.1835911453.

The spelling of 636463439 in words is "six hundred thirty-six million, four hundred sixty-three thousand, four hundred thirty-nine".