115318987 has 16 divisors (see below), whose sum is σ = 138539520. Its totient is φ = 93848832.

The previous prime is 115318979. The next prime is 115319003. The reversal of 115318987 is 789813511.

It is not a de Polignac number, because 115318987 - 2³ = 115318979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (115318927) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19803 + ... + 24955.

It is an arithmetic number, because the mean of its divisors is an integer number (8658720).

Almost surely, 2^115318987 is an apocalyptic number.

115318987 is a deficient number, since it is larger than the sum of its proper divisors (23220533).

115318987 is a wasteful number, since it uses less digits than its factorization.

115318987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5322.

The product of its digits is 60480, while the sum is 43.

The square root of 115318987 is about 10738.6678410313. The cubic root of 115318987 is about 486.7436258374.

The spelling of 115318987 in words is "one hundred fifteen million, three hundred eighteen thousand, nine hundred eighty-seven".