117777791 has 2 divisors, whose sum is σ = 117777792. Its totient is φ = 117777790.

The previous prime is 117777767. The next prime is 117777799. The reversal of 117777791 is 197777711.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 117777791 - 2¹⁴ = 117761407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (117777799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58888895 + 58888896.

It is an arithmetic number, because the mean of its divisors is an integer number (58888896).

Almost surely, 2^117777791 is an apocalyptic number.

117777791 is a deficient number, since it is larger than the sum of its proper divisors (1).

117777791 is an equidigital number, since it uses as much as digits as its factorization.

117777791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 151263, while the sum is 47.

The square root of 117777791 is about 10852.5476732424. The cubic root of 117777791 is about 490.1787366826.

The spelling of 117777791 in words is "one hundred seventeen million, seven hundred seventy-seven thousand, seven hundred ninety-one".