634667479 has 2 divisors, whose sum is σ = 634667480. Its totient is φ = 634667478.

The previous prime is 634667471. The next prime is 634667489. The reversal of 634667479 is 974766436.

634667479 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 634667479 - 2³ = 634667471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (634667471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317333739 + 317333740.

It is an arithmetic number, because the mean of its divisors is an integer number (317333740).

Almost surely, 2^634667479 is an apocalyptic number.

634667479 is a deficient number, since it is larger than the sum of its proper divisors (1).

634667479 is an equidigital number, since it uses as much as digits as its factorization.

634667479 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4572288, while the sum is 52.

The square root of 634667479 is about 25192.6076260478. The cubic root of 634667479 is about 859.3737458917.

The spelling of 634667479 in words is "six hundred thirty-four million, six hundred sixty-seven thousand, four hundred seventy-nine".