634904317 has 2 divisors, whose sum is σ = 634904318. Its totient is φ = 634904316.

The previous prime is 634904297. The next prime is 634904327. The reversal of 634904317 is 713409436.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 344065401 + 290838916 = 18549^2 + 17054^2 .

It is a cyclic number.

It is not a de Polignac number, because 634904317 - 2¹¹ = 634902269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (634904327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317452158 + 317452159.

It is an arithmetic number, because the mean of its divisors is an integer number (317452159).

Almost surely, 2^634904317 is an apocalyptic number.

It is an amenable number.

634904317 is a deficient number, since it is larger than the sum of its proper divisors (1).

634904317 is an equidigital number, since it uses as much as digits as its factorization.

634904317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 37.

The square root of 634904317 is about 25197.3077331686. The cubic root of 634904317 is about 859.4806297083.

The spelling of 634904317 in words is "six hundred thirty-four million, nine hundred four thousand, three hundred seventeen".