2313209 has 4 divisors (see below), whose sum is σ = 2320116. Its totient is φ = 2306304.

The previous prime is 2313197. The next prime is 2313211. The reversal of 2313209 is 9023132.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 861184 + 1452025 = 928^2 + 1205^2 .

It is a cyclic number.

It is not a de Polignac number, because 2313209 - 2¹² = 2309113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2313239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2924 + ... + 3629.

It is an arithmetic number, because the mean of its divisors is an integer number (580029).

2^2313209 is an apocalyptic number.

It is an amenable number.

2313209 is a deficient number, since it is larger than the sum of its proper divisors (6907).

2313209 is an equidigital number, since it uses as much as digits as its factorization.

2313209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6906.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 2313209 is about 1520.9237324731. The cubic root of 2313209 is about 132.2528250558.

The spelling of 2313209 in words is "two million, three hundred thirteen thousand, two hundred nine".