113621187 has 4 divisors (see below), whose sum is σ = 151494920. Its totient is φ = 75747456.

The previous prime is 113621177. The next prime is 113621201. The reversal of 113621187 is 781126311.

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

It is not a de Polignac number, because 113621187 - 2⁷ = 113621059 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (113621177) 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, 18936862 + ... + 18936867.

It is an arithmetic number, because the mean of its divisors is an integer number (37873730).

Almost surely, 2^113621187 is an apocalyptic number.

113621187 is a deficient number, since it is larger than the sum of its proper divisors (37873733).

113621187 is an equidigital number, since it uses as much as digits as its factorization.

113621187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37873732.

The product of its digits is 2016, while the sum is 30.

The square root of 113621187 is about 10659.3239466675. The cubic root of 113621187 is about 484.3430891055.

Adding to 113621187 its reverse (781126311), we get a palindrome (894747498).

The spelling of 113621187 in words is "one hundred thirteen million, six hundred twenty-one thousand, one hundred eighty-seven".