113021999 has 4 divisors (see below), whose sum is σ = 113912064. Its totient is φ = 112131936.

The previous prime is 113021983. The next prime is 113022047. The reversal of 113021999 is 999120311.

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 113021999 - 2⁴ = 113021983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113021299) 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, 444842 + ... + 445095.

It is an arithmetic number, because the mean of its divisors is an integer number (28478016).

Almost surely, 2^113021999 is an apocalyptic number.

113021999 is a deficient number, since it is larger than the sum of its proper divisors (890065).

113021999 is an equidigital number, since it uses as much as digits as its factorization.

113021999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 890064.

The product of its (nonzero) digits is 4374, while the sum is 35.

The square root of 113021999 is about 10631.1805082973. The cubic root of 113021999 is about 483.4901841575.

The spelling of 113021999 in words is "one hundred thirteen million, twenty-one thousand, nine hundred ninety-nine".