2390309 has 2 divisors, whose sum is σ = 2390310. Its totient is φ = 2390308.

The previous prime is 2390299. The next prime is 2390329. The reversal of 2390309 is 9030932.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1329409 + 1060900 = 1153^2 + 1030^2 .

It is a cyclic number.

It is not a de Polignac number, because 2390309 - 2⁸ = 2390053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2390329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1195154 + 1195155.

It is an arithmetic number, because the mean of its divisors is an integer number (1195155).

2^2390309 is an apocalyptic number.

It is an amenable number.

2390309 is a deficient number, since it is larger than the sum of its proper divisors (1).

2390309 is an equidigital number, since it uses as much as digits as its factorization.

2390309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1458, while the sum is 26.

The square root of 2390309 is about 1546.0624178862. The cubic root of 2390309 is about 133.7061392853.

The spelling of 2390309 in words is "two million, three hundred ninety thousand, three hundred nine".