634582909 has 2 divisors, whose sum is σ = 634582910. Its totient is φ = 634582908.

The previous prime is 634582889. The next prime is 634582913. The reversal of 634582909 is 909285436.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 548964900 + 85618009 = 23430^2 + 9253^2 .

It is a cyclic number.

It is not a de Polignac number, because 634582909 - 2¹¹ = 634580861 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 (634582979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317291454 + 317291455.

It is an arithmetic number, because the mean of its divisors is an integer number (317291455).

Almost surely, 2^634582909 is an apocalyptic number.

It is an amenable number.

634582909 is a deficient number, since it is larger than the sum of its proper divisors (1).

634582909 is an equidigital number, since it uses as much as digits as its factorization.

634582909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 466560, while the sum is 46.

The square root of 634582909 is about 25190.9291015635. The cubic root of 634582909 is about 859.3355734269.

The spelling of 634582909 in words is "six hundred thirty-four million, five hundred eighty-two thousand, nine hundred nine".