634889707 has 2 divisors, whose sum is σ = 634889708. Its totient is φ = 634889706.

The previous prime is 634889699. The next prime is 634889713. The reversal of 634889707 is 707988436.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 634889707 - 2³ = 634889699 is a prime.

It is not a weakly prime, because it can be changed into another prime (634889107) 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, 317444853 + 317444854.

It is an arithmetic number, because the mean of its divisors is an integer number (317444854).

Almost surely, 2^634889707 is an apocalyptic number.

634889707 is a deficient number, since it is larger than the sum of its proper divisors (1).

634889707 is an equidigital number, since it uses as much as digits as its factorization.

634889707 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2032128, while the sum is 52.

The square root of 634889707 is about 25197.0178195754. The cubic root of 634889707 is about 859.4740370570.

The spelling of 634889707 in words is "six hundred thirty-four million, eight hundred eighty-nine thousand, seven hundred seven".