634429129 has 2 divisors, whose sum is σ = 634429130. Its totient is φ = 634429128.

The previous prime is 634429111. The next prime is 634429139. The reversal of 634429129 is 921924436.

634429129 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 593019904 + 41409225 = 24352^2 + 6435^2 .

It is a cyclic number.

It is not a de Polignac number, because 634429129 - 2⁹ = 634428617 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 634429091 and 634429100.

It is not a weakly prime, because it can be changed into another prime (634429139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317214564 + 317214565.

It is an arithmetic number, because the mean of its divisors is an integer number (317214565).

Almost surely, 2^634429129 is an apocalyptic number.

It is an amenable number.

634429129 is a deficient number, since it is larger than the sum of its proper divisors (1).

634429129 is an equidigital number, since it uses as much as digits as its factorization.

634429129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 93312, while the sum is 40.

The square root of 634429129 is about 25187.8766274571. The cubic root of 634429129 is about 859.2661528681.

The spelling of 634429129 in words is "six hundred thirty-four million, four hundred twenty-nine thousand, one hundred twenty-nine".