634538167 has 2 divisors, whose sum is σ = 634538168. Its totient is φ = 634538166.

The previous prime is 634538153. The next prime is 634538171. The reversal of 634538167 is 761835436.

634538167 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 is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-634538167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (634538137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317269083 + 317269084.

It is an arithmetic number, because the mean of its divisors is an integer number (317269084).

Almost surely, 2^634538167 is an apocalyptic number.

634538167 is a deficient number, since it is larger than the sum of its proper divisors (1).

634538167 is an equidigital number, since it uses as much as digits as its factorization.

634538167 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 43.

The square root of 634538167 is about 25190.0410281524. The cubic root of 634538167 is about 859.3153768036.

The spelling of 634538167 in words is "six hundred thirty-four million, five hundred thirty-eight thousand, one hundred sixty-seven".