634876589 has 2 divisors, whose sum is σ = 634876590. Its totient is φ = 634876588.

The previous prime is 634876537. The next prime is 634876667. The reversal of 634876589 is 985678436.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 629508100 + 5368489 = 25090^2 + 2317^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-634876589 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (634876189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317438294 + 317438295.

It is an arithmetic number, because the mean of its divisors is an integer number (317438295).

Almost surely, 2^634876589 is an apocalyptic number.

It is an amenable number.

634876589 is a deficient number, since it is larger than the sum of its proper divisors (1).

634876589 is an equidigital number, since it uses as much as digits as its factorization.

634876589 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8709120, while the sum is 56.

The square root of 634876589 is about 25196.7575096479. The cubic root of 634876589 is about 859.4681175731.

The spelling of 634876589 in words is "six hundred thirty-four million, eight hundred seventy-six thousand, five hundred eighty-nine".