113013209 has 2 divisors, whose sum is σ = 113013210. Its totient is φ = 113013208.

The previous prime is 113013193. The next prime is 113013211. The reversal of 113013209 is 902310311.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 108160000 + 4853209 = 10400^2 + 2203^2 .

It is a cyclic number.

It is not a de Polignac number, because 113013209 - 2⁴ = 113013193 is a prime.

It is a Sophie Germain prime.

Together with 113013211, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (113013269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56506604 + 56506605.

It is an arithmetic number, because the mean of its divisors is an integer number (56506605).

Almost surely, 2^113013209 is an apocalyptic number.

It is an amenable number.

113013209 is a deficient number, since it is larger than the sum of its proper divisors (1).

113013209 is an equidigital number, since it uses as much as digits as its factorization.

113013209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 20.

The square root of 113013209 is about 10630.7670936767. The cubic root of 113013209 is about 483.4776497573.

The spelling of 113013209 in words is "one hundred thirteen million, thirteen thousand, two hundred nine".