113556209 has 8 divisors (see below), whose sum is σ = 129485160. Its totient is φ = 98654976.

The previous prime is 113556203. The next prime is 113556227. The reversal of 113556209 is 902655311.

It can be written as a sum of positive squares in 4 ways, for example, as 29430625 + 84125584 = 5425^2 + 9172^2 .

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 113556209 - 2¹⁶ = 113490673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (113556203) 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, 256694 + ... + 257135.

It is an arithmetic number, because the mean of its divisors is an integer number (16185645).

Almost surely, 2^113556209 is an apocalyptic number.

It is an amenable number.

113556209 is a deficient number, since it is larger than the sum of its proper divisors (15928951).

113556209 is a wasteful number, since it uses less digits than its factorization.

113556209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513859.

The product of its (nonzero) digits is 8100, while the sum is 32.

The square root of 113556209 is about 10656.2755688843. The cubic root of 113556209 is about 484.2507423424.

The spelling of 113556209 in words is "one hundred thirteen million, five hundred fifty-six thousand, two hundred nine".