2239309 has 2 divisors, whose sum is σ = 2239310. Its totient is φ = 2239308.

The previous prime is 2239301. The next prime is 2239319. The reversal of 2239309 is 9039322.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1447209 + 792100 = 1203^2 + 890^2 .

It is a cyclic number.

It is not a de Polignac number, because 2239309 - 2³ = 2239301 is a prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2239301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1119654 + 1119655.

It is an arithmetic number, because the mean of its divisors is an integer number (1119655).

2^2239309 is an apocalyptic number.

It is an amenable number.

2239309 is a deficient number, since it is larger than the sum of its proper divisors (1).

2239309 is an equidigital number, since it uses as much as digits as its factorization.

2239309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2916, while the sum is 28.

The square root of 2239309 is about 1496.4320900061. The cubic root of 2239309 is about 130.8291968166.

The spelling of 2239309 in words is "two million, two hundred thirty-nine thousand, three hundred nine".