634953589 has 2 divisors, whose sum is σ = 634953590. Its totient is φ = 634953588.

The previous prime is 634953551. The next prime is 634953619. The reversal of 634953589 is 985359436.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 612315025 + 22638564 = 24745^2 + 4758^2 .

It is a cyclic number.

It is not a de Polignac number, because 634953589 - 2¹³ = 634945397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (634953509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317476794 + 317476795.

It is an arithmetic number, because the mean of its divisors is an integer number (317476795).

Almost surely, 2^634953589 is an apocalyptic number.

It is an amenable number.

634953589 is a deficient number, since it is larger than the sum of its proper divisors (1).

634953589 is an equidigital number, since it uses as much as digits as its factorization.

634953589 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3499200, while the sum is 52.

The square root of 634953589 is about 25198.2854377039. The cubic root of 634953589 is about 859.5028625776.

The spelling of 634953589 in words is "six hundred thirty-four million, nine hundred fifty-three thousand, five hundred eighty-nine".