117631138609 has 2 divisors, whose sum is σ = 117631138610. Its totient is φ = 117631138608.

The previous prime is 117631138607. The next prime is 117631138633. The reversal of 117631138609 is 906831136711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75812115600 + 41819023009 = 275340^2 + 204497^2 .

It is an emirp because it is prime and its reverse (906831136711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 117631138609 - 2¹ = 117631138607 is a prime.

Together with 117631138607, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (117631138607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58815569304 + 58815569305.

It is an arithmetic number, because the mean of its divisors is an integer number (58815569305).

Almost surely, 2^117631138609 is an apocalyptic number.

It is an amenable number.

117631138609 is a deficient number, since it is larger than the sum of its proper divisors (1).

117631138609 is an equidigital number, since it uses as much as digits as its factorization.

117631138609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 163296, while the sum is 46.

The spelling of 117631138609 in words is "one hundred seventeen billion, six hundred thirty-one million, one hundred thirty-eight thousand, six hundred nine".