115980813 has 18 divisors (see below), whose sum is σ = 181408266. Its totient is φ = 71371872.

The previous prime is 115980803. The next prime is 115980833. The reversal of 115980813 is 318089511.

It can be written as a sum of positive squares in 3 ways, for example, as 1340964 + 114639849 = 1158^2 + 10707^2 .

It is not a de Polignac number, because 115980813 - 2⁹ = 115980301 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115980803) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 36606 + ... + 39647.

It is an arithmetic number, because the mean of its divisors is an integer number (10078237).

Almost surely, 2^115980813 is an apocalyptic number.

115980813 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

115980813 is a deficient number, since it is larger than the sum of its proper divisors (65427453).

115980813 is a wasteful number, since it uses less digits than its factorization.

115980813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76285 (or 76269 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 36.

The square root of 115980813 is about 10769.4388433196. The cubic root of 115980813 is about 487.6730052628.

The spelling of 115980813 in words is "one hundred fifteen million, nine hundred eighty thousand, eight hundred thirteen".