117878693131 has 2 divisors, whose sum is σ = 117878693132. Its totient is φ = 117878693130.

The previous prime is 117878693113. The next prime is 117878693137. The reversal of 117878693131 is 131396878711.

It is a happy number.

Together with previous prime (117878693113) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 117878693131 - 2³¹ = 115731209483 is a prime.

It is a super-2 number, since 2×117878693131² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (117878693137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58939346565 + 58939346566.

It is an arithmetic number, because the mean of its divisors is an integer number (58939346566).

Almost surely, 2^117878693131 is an apocalyptic number.

117878693131 is a deficient number, since it is larger than the sum of its proper divisors (1).

117878693131 is an equidigital number, since it uses as much as digits as its factorization.

117878693131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1524096, while the sum is 55.

The spelling of 117878693131 in words is "one hundred seventeen billion, eight hundred seventy-eight million, six hundred ninety-three thousand, one hundred thirty-one".