634168679 has 2 divisors, whose sum is σ = 634168680. Its totient is φ = 634168678.

The previous prime is 634168669. The next prime is 634168709. The reversal of 634168679 is 976861436.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 634168679 - 2¹⁶ = 634103143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (634168609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317084339 + 317084340.

It is an arithmetic number, because the mean of its divisors is an integer number (317084340).

Almost surely, 2^634168679 is an apocalyptic number.

634168679 is a deficient number, since it is larger than the sum of its proper divisors (1).

634168679 is an equidigital number, since it uses as much as digits as its factorization.

634168679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1306368, while the sum is 50.

The square root of 634168679 is about 25182.7059507115. The cubic root of 634168679 is about 859.1485529182.

The spelling of 634168679 in words is "six hundred thirty-four million, one hundred sixty-eight thousand, six hundred seventy-nine".