113787987 has 32 divisors (see below), whose sum is σ = 168625152. Its totient is φ = 67935744.

The previous prime is 113787977. The next prime is 113788009. The reversal of 113787987 is 789787311.

It is a happy number.

It is not a de Polignac number, because 113787987 - 2⁸ = 113787731 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (113787907) 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 31 ways as a sum of consecutive naturals, for example, 88048 + ... + 89330.

It is an arithmetic number, because the mean of its divisors is an integer number (5269536).

Almost surely, 2^113787987 is an apocalyptic number.

113787987 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

113787987 is a deficient number, since it is larger than the sum of its proper divisors (54837165).

113787987 is a wasteful number, since it uses less digits than its factorization.

113787987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1387.

The product of its digits is 592704, while the sum is 51.

The square root of 113787987 is about 10667.1452132236. The cubic root of 113787987 is about 484.5799842603.

The spelling of 113787987 in words is "one hundred thirteen million, seven hundred eighty-seven thousand, nine hundred eighty-seven".