113218609 has 8 divisors (see below), whose sum is σ = 129656000. Its totient is φ = 96847056.

The previous prime is 113218597. The next prime is 113218619. The reversal of 113218609 is 906812311.

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 113218609 - 2¹⁵ = 113185841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (113218619) 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, 12714 + ... + 19699.

It is an arithmetic number, because the mean of its divisors is an integer number (16207000).

Almost surely, 2^113218609 is an apocalyptic number.

It is an amenable number.

113218609 is a deficient number, since it is larger than the sum of its proper divisors (16437391).

113218609 is an equidigital number, since it uses as much as digits as its factorization.

113218609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32919.

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

The square root of 113218609 is about 10640.4233468410. The cubic root of 113218609 is about 483.7703772127.

The spelling of 113218609 in words is "one hundred thirteen million, two hundred eighteen thousand, six hundred nine".