113816209 has 8 divisors (see below), whose sum is σ = 122706920. Its totient is φ = 104944896.

The previous prime is 113816203. The next prime is 113816233. The reversal of 113816209 is 902618311.

It can be written as a sum of positive squares in 4 ways, for example, as 73984 + 113742225 = 272^2 + 10665^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 113816209 - 2⁵ = 113816177 is a prime.

It is a super-2 number, since 2×113816209² = 25908258862263362, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (113816203) 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, 8779 + ... + 17455.

It is an arithmetic number, because the mean of its divisors is an integer number (15338365).

Almost surely, 2^113816209 is an apocalyptic number.

It is an amenable number.

113816209 is a deficient number, since it is larger than the sum of its proper divisors (8890711).

113816209 is a wasteful number, since it uses less digits than its factorization.

113816209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9699.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 113816209 is about 10668.4679781119. The cubic root of 113816209 is about 484.6200432219.

The spelling of 113816209 in words is "one hundred thirteen million, eight hundred sixteen thousand, two hundred nine".