113637921 has 16 divisors (see below), whose sum is σ = 157886400. Its totient is φ = 72612288.

The previous prime is 113637899. The next prime is 113637929. The reversal of 113637921 is 129736311.

It is not a de Polignac number, because 113637921 - 2⁷ = 113637793 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (113637929) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7395 + ... + 16791.

It is an arithmetic number, because the mean of its divisors is an integer number (9867900).

Almost surely, 2^113637921 is an apocalyptic number.

It is an amenable number.

113637921 is a deficient number, since it is larger than the sum of its proper divisors (44248479).

113637921 is a wasteful number, since it uses less digits than its factorization.

113637921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9568.

The product of its digits is 6804, while the sum is 33.

The square root of 113637921 is about 10660.1088643597. The cubic root of 113637921 is about 484.3668657725.

The spelling of 113637921 in words is "one hundred thirteen million, six hundred thirty-seven thousand, nine hundred twenty-one".