115477987 has 4 divisors (see below), whose sum is σ = 115549336. Its totient is φ = 115406640.

The previous prime is 115477961. The next prime is 115477993. The reversal of 115477987 is 789774511.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-115477987 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 115477987.

It is not an unprimeable number, because it can be changed into a prime (115477997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33189 + ... + 36502.

It is an arithmetic number, because the mean of its divisors is an integer number (28887334).

Almost surely, 2^115477987 is an apocalyptic number.

115477987 is a deficient number, since it is larger than the sum of its proper divisors (71349).

115477987 is an equidigital number, since it uses as much as digits as its factorization.

115477987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71348.

The product of its digits is 493920, while the sum is 49.

The square root of 115477987 is about 10746.0684438542. The cubic root of 115477987 is about 486.9672279133.

The spelling of 115477987 in words is "one hundred fifteen million, four hundred seventy-seven thousand, nine hundred eighty-seven".