113806821 has 8 divisors (see below), whose sum is σ = 151801024. Its totient is φ = 75841920.

The previous prime is 113806813. The next prime is 113806831. The reversal of 113806821 is 128608311.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 113806821 - 2³ = 113806813 is a prime.

It is a super-2 number, since 2×113806821² = 25903985012252082, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (113806831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4440 + ... + 15726.

It is an arithmetic number, because the mean of its divisors is an integer number (18975128).

Almost surely, 2^113806821 is an apocalyptic number.

It is an amenable number.

113806821 is a deficient number, since it is larger than the sum of its proper divisors (37994203).

113806821 is a wasteful number, since it uses less digits than its factorization.

113806821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14651.

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 113806821 is about 10668.0279808407. The cubic root of 113806821 is about 484.6067184120.

The spelling of 113806821 in words is "one hundred thirteen million, eight hundred six thousand, eight hundred twenty-one".