2303309 has 2 divisors, whose sum is σ = 2303310. Its totient is φ = 2303308.

The previous prime is 2303303. The next prime is 2303321. The reversal of 2303309 is 9033032.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1876900 + 426409 = 1370^2 + 653^2 .

It is a cyclic number.

It is not a de Polignac number, because 2303309 - 2⁴ = 2303293 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a plaindrome in base 11.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2303303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1151654 + 1151655.

It is an arithmetic number, because the mean of its divisors is an integer number (1151655).

2^2303309 is an apocalyptic number.

It is an amenable number.

2303309 is a deficient number, since it is larger than the sum of its proper divisors (1).

2303309 is an equidigital number, since it uses as much as digits as its factorization.

2303309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 486, while the sum is 20.

The square root of 2303309 is about 1517.6656417011. The cubic root of 2303309 is about 132.0638847482.

The spelling of 2303309 in words is "two million, three hundred three thousand, three hundred nine".