117878693111 has 2 divisors, whose sum is σ = 117878693112. Its totient is φ = 117878693110.

The previous prime is 117878693077. The next prime is 117878693113. The reversal of 117878693111 is 111396878711.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-117878693111 is a prime.

It is a Sophie Germain prime.

Together with 117878693113, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (117878693113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58939346555 + 58939346556.

It is an arithmetic number, because the mean of its divisors is an integer number (58939346556).

Almost surely, 2^117878693111 is an apocalyptic number.

117878693111 is a deficient number, since it is larger than the sum of its proper divisors (1).

117878693111 is an equidigital number, since it uses as much as digits as its factorization.

117878693111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 508032, while the sum is 53.

The spelling of 117878693111 in words is "one hundred seventeen billion, eight hundred seventy-eight million, six hundred ninety-three thousand, one hundred eleven".