115775789 has 2 divisors, whose sum is σ = 115775790. Its totient is φ = 115775788.

The previous prime is 115775773. The next prime is 115775809. The reversal of 115775789 is 987577511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 112996900 + 2778889 = 10630^2 + 1667^2 .

It is a cyclic number.

It is not a de Polignac number, because 115775789 - 2⁴ = 115775773 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115775719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57887894 + 57887895.

It is an arithmetic number, because the mean of its divisors is an integer number (57887895).

Almost surely, 2^115775789 is an apocalyptic number.

It is an amenable number.

115775789 is a deficient number, since it is larger than the sum of its proper divisors (1).

115775789 is an equidigital number, since it uses as much as digits as its factorization.

115775789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 617400, while the sum is 50.

The square root of 115775789 is about 10759.9158453958. The cubic root of 115775789 is about 487.3854759689.

It can be divided in two parts, 11577 and 5789, that multiplied together give a triangular number (67019253 = T₁₁₅₇₇).

The spelling of 115775789 in words is "one hundred fifteen million, seven hundred seventy-five thousand, seven hundred eighty-nine".