634973663 has 2 divisors, whose sum is σ = 634973664. Its totient is φ = 634973662.

The previous prime is 634973657. The next prime is 634973699. The reversal of 634973663 is 366379436.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-634973663 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (634973263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317486831 + 317486832.

It is an arithmetic number, because the mean of its divisors is an integer number (317486832).

Almost surely, 2^634973663 is an apocalyptic number.

634973663 is a deficient number, since it is larger than the sum of its proper divisors (1).

634973663 is an equidigital number, since it uses as much as digits as its factorization.

634973663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1469664, while the sum is 47.

The square root of 634973663 is about 25198.6837553075. The cubic root of 634973663 is about 859.5119201838.

The spelling of 634973663 in words is "six hundred thirty-four million, nine hundred seventy-three thousand, six hundred sixty-three".