115687491 has 8 divisors (see below), whose sum is σ = 155233104. Its totient is φ = 76633440.

The previous prime is 115687487. The next prime is 115687511. The reversal of 115687491 is 194786511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 115687491 - 2² = 115687487 is a prime.

It is not an unprimeable number, because it can be changed into a prime (115687421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 122340 + ... + 123281.

It is an arithmetic number, because the mean of its divisors is an integer number (19404138).

Almost surely, 2^115687491 is an apocalyptic number.

115687491 is a deficient number, since it is larger than the sum of its proper divisors (39545613).

115687491 is a wasteful number, since it uses less digits than its factorization.

115687491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245781.

The product of its digits is 60480, while the sum is 42.

The square root of 115687491 is about 10755.8119637710. The cubic root of 115687491 is about 487.2615407080.

The spelling of 115687491 in words is "one hundred fifteen million, six hundred eighty-seven thousand, four hundred ninety-one".