117138942689 has 2 divisors, whose sum is σ = 117138942690. Its totient is φ = 117138942688.

The previous prime is 117138942677. The next prime is 117138942719. The reversal of 117138942689 is 986249831711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68112126289 + 49026816400 = 260983^2 + 221420^2 .

It is a cyclic number.

It is not a de Polignac number, because 117138942689 - 2²⁸ = 116870507233 is a prime.

It is not a weakly prime, because it can be changed into another prime (117138942889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58569471344 + 58569471345.

It is an arithmetic number, because the mean of its divisors is an integer number (58569471345).

Almost surely, 2^117138942689 is an apocalyptic number.

It is an amenable number.

117138942689 is a deficient number, since it is larger than the sum of its proper divisors (1).

117138942689 is an equidigital number, since it uses as much as digits as its factorization.

117138942689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5225472, while the sum is 59.

The spelling of 117138942689 in words is "one hundred seventeen billion, one hundred thirty-eight million, nine hundred forty-two thousand, six hundred eighty-nine".