634008820169 has 2 divisors, whose sum is σ = 634008820170. Its totient is φ = 634008820168.

The previous prime is 634008820153. The next prime is 634008820231. The reversal of 634008820169 is 961028800436.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 476082060169 + 157926760000 = 689987^2 + 397400^2 .

It is a cyclic number.

It is not a de Polignac number, because 634008820169 - 2⁴ = 634008820153 is a prime.

It is a super-2 number, since 2×634008820169² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (634008826169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317004410084 + 317004410085.

It is an arithmetic number, because the mean of its divisors is an integer number (317004410085).

Almost surely, 2^634008820169 is an apocalyptic number.

It is an amenable number.

634008820169 is a deficient number, since it is larger than the sum of its proper divisors (1).

634008820169 is an equidigital number, since it uses as much as digits as its factorization.

634008820169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 497664, while the sum is 47.

The spelling of 634008820169 in words is "six hundred thirty-four billion, eight million, eight hundred twenty thousand, one hundred sixty-nine".