117777811 has 2 divisors, whose sum is σ = 117777812. Its totient is φ = 117777810.

The previous prime is 117777799. The next prime is 117777839. The reversal of 117777811 is 118777711.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 117777811 - 2²⁵ = 84223379 is a prime.

It is a super-2 number, since 2×117777811² = 27743225527903442, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (117777841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58888905 + 58888906.

It is an arithmetic number, because the mean of its divisors is an integer number (58888906).

Almost surely, 2^117777811 is an apocalyptic number.

117777811 is a deficient number, since it is larger than the sum of its proper divisors (1).

117777811 is an equidigital number, since it uses as much as digits as its factorization.

117777811 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19208, while the sum is 40.

The square root of 117777811 is about 10852.5485946850. The cubic root of 117777811 is about 490.1787644286.

The spelling of 117777811 in words is "one hundred seventeen million, seven hundred seventy-seven thousand, eight hundred eleven".