113020209 has 12 divisors (see below), whose sum is σ = 163524036. Its totient is φ = 75220992.

The previous prime is 113020207. The next prime is 113020217. The reversal of 113020209 is 902020311.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 18249984 + 94770225 = 4272^2 + 9735^2 .

It is not a de Polignac number, because 113020209 - 2¹ = 113020207 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 113020191 and 113020200.

It is not an unprimeable number, because it can be changed into a prime (113020207) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4624 + ... + 15729.

It is an arithmetic number, because the mean of its divisors is an integer number (13627003).

Almost surely, 2^113020209 is an apocalyptic number.

It is an amenable number.

113020209 is a deficient number, since it is larger than the sum of its proper divisors (50503827).

113020209 is a wasteful number, since it uses less digits than its factorization.

113020209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20976 (or 20973 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

The square root of 113020209 is about 10631.0963216406. The cubic root of 113020209 is about 483.4876316987.

The spelling of 113020209 in words is "one hundred thirteen million, twenty thousand, two hundred nine".