634956197 has 2 divisors, whose sum is σ = 634956198. Its totient is φ = 634956196.

The previous prime is 634956163. The next prime is 634956209. The reversal of 634956197 is 791659436.

634956197 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 618317956 + 16638241 = 24866^2 + 4079^2 .

It is a cyclic number.

It is not a de Polignac number, because 634956197 - 2⁸ = 634955941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (634956697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317478098 + 317478099.

It is an arithmetic number, because the mean of its divisors is an integer number (317478099).

Almost surely, 2^634956197 is an apocalyptic number.

It is an amenable number.

634956197 is a deficient number, since it is larger than the sum of its proper divisors (1).

634956197 is an equidigital number, since it uses as much as digits as its factorization.

634956197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1224720, while the sum is 50.

The square root of 634956197 is about 25198.3371872034. The cubic root of 634956197 is about 859.5040393462.

The spelling of 634956197 in words is "six hundred thirty-four million, nine hundred fifty-six thousand, one hundred ninety-seven".