115539913 has 2 divisors, whose sum is σ = 115539914. Its totient is φ = 115539912.

The previous prime is 115539899. The next prime is 115539923. The reversal of 115539913 is 319935511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59783824 + 55756089 = 7732^2 + 7467^2 .

It is a cyclic number.

It is not a de Polignac number, because 115539913 - 2¹³ = 115531721 is a prime.

It is not a weakly prime, because it can be changed into another prime (115539923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57769956 + 57769957.

It is an arithmetic number, because the mean of its divisors is an integer number (57769957).

Almost surely, 2^115539913 is an apocalyptic number.

It is an amenable number.

115539913 is a deficient number, since it is larger than the sum of its proper divisors (1).

115539913 is an equidigital number, since it uses as much as digits as its factorization.

115539913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18225, while the sum is 37.

The square root of 115539913 is about 10748.9493905218. The cubic root of 115539913 is about 487.0542590566.

The spelling of 115539913 in words is "one hundred fifteen million, five hundred thirty-nine thousand, nine hundred thirteen".