113878665 has 24 divisors (see below), whose sum is σ = 209002248. Its totient is φ = 57162240.

The previous prime is 113878657. The next prime is 113878747. The reversal of 113878665 is 566878311.

It can be written as a sum of positive squares in 4 ways, for example, as 4822416 + 109056249 = 2196^2 + 10443^2 .

It is not a de Polignac number, because 113878665 - 2³ = 113878657 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 113878665.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 73666 + ... + 75195.

It is an arithmetic number, because the mean of its divisors is an integer number (8708427).

Almost surely, 2^113878665 is an apocalyptic number.

113878665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

113878665 is a deficient number, since it is larger than the sum of its proper divisors (95123583).

113878665 is a wasteful number, since it uses less digits than its factorization.

113878665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148889 (or 148886 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 113878665 is about 10671.3947073473. The cubic root of 113878665 is about 484.7086711805.

The spelling of 113878665 in words is "one hundred thirteen million, eight hundred seventy-eight thousand, six hundred sixty-five".