115523987 has 2 divisors, whose sum is σ = 115523988. Its totient is φ = 115523986.

The previous prime is 115523981. The next prime is 115523999. The reversal of 115523987 is 789325511.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 115523987 - 2⁶ = 115523923 is a prime.

It is not a weakly prime, because it can be changed into another prime (115523981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57761993 + 57761994.

It is an arithmetic number, because the mean of its divisors is an integer number (57761994).

Almost surely, 2^115523987 is an apocalyptic number.

115523987 is a deficient number, since it is larger than the sum of its proper divisors (1).

115523987 is an equidigital number, since it uses as much as digits as its factorization.

115523987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 75600, while the sum is 41.

The square root of 115523987 is about 10748.2085484047. The cubic root of 115523987 is about 487.0318795390.

The spelling of 115523987 in words is "one hundred fifteen million, five hundred twenty-three thousand, nine hundred eighty-seven".