115777993 has 2 divisors, whose sum is σ = 115777994. Its totient is φ = 115777992.

The previous prime is 115777979. The next prime is 115778009. The reversal of 115777993 is 399777511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76877824 + 38900169 = 8768^2 + 6237^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-115777993 is a prime.

It is not a weakly prime, because it can be changed into another prime (115777903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57888996 + 57888997.

It is an arithmetic number, because the mean of its divisors is an integer number (57888997).

Almost surely, 2^115777993 is an apocalyptic number.

It is an amenable number.

115777993 is a deficient number, since it is larger than the sum of its proper divisors (1).

115777993 is an equidigital number, since it uses as much as digits as its factorization.

115777993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 416745, while the sum is 49.

The square root of 115777993 is about 10760.0182620663. The cubic root of 115777993 is about 487.3885687018.

The spelling of 115777993 in words is "one hundred fifteen million, seven hundred seventy-seven thousand, nine hundred ninety-three".