634772429 has 2 divisors, whose sum is σ = 634772430. Its totient is φ = 634772428.

The previous prime is 634772363. The next prime is 634772443. The reversal of 634772429 is 924277436.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 334963204 + 299809225 = 18302^2 + 17315^2 .

It is a cyclic number.

It is not a de Polignac number, because 634772429 - 2²⁸ = 366336973 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 634772429.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (634774429) 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, 317386214 + 317386215.

It is an arithmetic number, because the mean of its divisors is an integer number (317386215).

Almost surely, 2^634772429 is an apocalyptic number.

It is an amenable number.

634772429 is a deficient number, since it is larger than the sum of its proper divisors (1).

634772429 is an equidigital number, since it uses as much as digits as its factorization.

634772429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 508032, while the sum is 44.

The square root of 634772429 is about 25194.6904922446. The cubic root of 634772429 is about 859.4211125872.

The spelling of 634772429 in words is "six hundred thirty-four million, seven hundred seventy-two thousand, four hundred twenty-nine".