634889713 has 2 divisors, whose sum is σ = 634889714. Its totient is φ = 634889712.

The previous prime is 634889707. The next prime is 634889729. The reversal of 634889713 is 317988436.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 601573729 + 33315984 = 24527^2 + 5772^2 .

It is a cyclic number.

It is not a de Polignac number, because 634889713 - 2¹³ = 634881521 is a prime.

It is not a weakly prime, because it can be changed into another prime (634889753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317444856 + 317444857.

It is an arithmetic number, because the mean of its divisors is an integer number (317444857).

Almost surely, 2^634889713 is an apocalyptic number.

It is an amenable number.

634889713 is a deficient number, since it is larger than the sum of its proper divisors (1).

634889713 is an equidigital number, since it uses as much as digits as its factorization.

634889713 is an evil number, because the sum of its binary digits is even.

The product of its digits is 870912, while the sum is 49.

The square root of 634889713 is about 25197.0179386371. The cubic root of 634889713 is about 859.4740397644.

The spelling of 634889713 in words is "six hundred thirty-four million, eight hundred eighty-nine thousand, seven hundred thirteen".