634474439 has 2 divisors, whose sum is σ = 634474440. Its totient is φ = 634474438.

The previous prime is 634474363. The next prime is 634474447. The reversal of 634474439 is 934474436.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 634474439 - 2²⁸ = 366038983 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 634474439.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (634474469) 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, 317237219 + 317237220.

It is an arithmetic number, because the mean of its divisors is an integer number (317237220).

Almost surely, 2^634474439 is an apocalyptic number.

634474439 is a deficient number, since it is larger than the sum of its proper divisors (1).

634474439 is an equidigital number, since it uses as much as digits as its factorization.

634474439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 870912, while the sum is 44.

The square root of 634474439 is about 25188.7760520435. The cubic root of 634474439 is about 859.2866082248.

The spelling of 634474439 in words is "six hundred thirty-four million, four hundred seventy-four thousand, four hundred thirty-nine".