115539899 has 2 divisors, whose sum is σ = 115539900. Its totient is φ = 115539898.

The previous prime is 115539847. The next prime is 115539913. The reversal of 115539899 is 998935511.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 115539899 - 2¹² = 115535803 is a prime.

It is not a weakly prime, because it can be changed into another prime (115539829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57769949 + 57769950.

It is an arithmetic number, because the mean of its divisors is an integer number (57769950).

Almost surely, 2^115539899 is an apocalyptic number.

115539899 is a deficient number, since it is larger than the sum of its proper divisors (1).

115539899 is an equidigital number, since it uses as much as digits as its factorization.

115539899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 437400, while the sum is 50.

The square root of 115539899 is about 10748.9487392954. The cubic root of 115539899 is about 487.0542393844.

The spelling of 115539899 in words is "one hundred fifteen million, five hundred thirty-nine thousand, eight hundred ninety-nine".