113117209 has 4 divisors (see below), whose sum is σ = 113173200. Its totient is φ = 113061220.

The previous prime is 113117189. The next prime is 113117327. The reversal of 113117209 is 902711311.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 902711311 = 37 ⋅24397603.

It is a cyclic number.

It is not a de Polignac number, because 113117209 - 2¹⁵ = 113084441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (113117009) 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, 24847 + ... + 29044.

It is an arithmetic number, because the mean of its divisors is an integer number (28293300).

Almost surely, 2^113117209 is an apocalyptic number.

It is an amenable number.

113117209 is a deficient number, since it is larger than the sum of its proper divisors (55991).

113117209 is an equidigital number, since it uses as much as digits as its factorization.

113117209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55990.

The product of its (nonzero) digits is 378, while the sum is 25.

The square root of 113117209 is about 10635.6574314896. The cubic root of 113117209 is about 483.6259104785.

The spelling of 113117209 in words is "one hundred thirteen million, one hundred seventeen thousand, two hundred nine".