113999 has 4 divisors (see below), whose sum is σ = 117960. Its totient is φ = 110040.

The previous prime is 113989. The next prime is 114001. The reversal of 113999 is 999311.

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 113999 - 2⁴ = 113983 is a prime.

It is a Duffinian number.

113999 is a modest number, since divided by 999 gives 113 as remainder.

It is a plaindrome in base 10.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 113999.

It is not an unprimeable number, because it can be changed into a prime (113909) 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, 1937 + ... + 1994.

It is an arithmetic number, because the mean of its divisors is an integer number (29490).

2¹¹³⁹⁹⁹ is an apocalyptic number.

113999 is a deficient number, since it is larger than the sum of its proper divisors (3961).

113999 is an equidigital number, since it uses as much as digits as its factorization.

113999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3960.

The product of its digits is 2187, while the sum is 32.

The square root of 113999 is about 337.6373794472. The cubic root of 113999 is about 48.4879340800.

The spelling of 113999 in words is "one hundred thirteen thousand, nine hundred ninety-nine".