115891487 has 4 divisors (see below), whose sum is σ = 116585616. Its totient is φ = 115197360.

The previous prime is 115891483. The next prime is 115891553. The reversal of 115891487 is 784198511.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 115891487 - 2² = 115891483 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115891481) 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, 346814 + ... + 347147.

It is an arithmetic number, because the mean of its divisors is an integer number (29146404).

Almost surely, 2^115891487 is an apocalyptic number.

115891487 is a deficient number, since it is larger than the sum of its proper divisors (694129).

115891487 is an equidigital number, since it uses as much as digits as its factorization.

115891487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 694128.

The product of its digits is 80640, while the sum is 44.

The square root of 115891487 is about 10765.2908460478. The cubic root of 115891487 is about 487.5477745860.

The spelling of 115891487 in words is "one hundred fifteen million, eight hundred ninety-one thousand, four hundred eighty-seven".