2945309 has 2 divisors, whose sum is σ = 2945310. Its totient is φ = 2945308.

The previous prime is 2945303. The next prime is 2945321. The reversal of 2945309 is 9035492.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1493284 + 1452025 = 1222^2 + 1205^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2945309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2945303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1472654 + 1472655.

It is an arithmetic number, because the mean of its divisors is an integer number (1472655).

2^2945309 is an apocalyptic number.

It is an amenable number.

2945309 is a deficient number, since it is larger than the sum of its proper divisors (1).

2945309 is an equidigital number, since it uses as much as digits as its factorization.

2945309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 2945309 is about 1716.1902575181. The cubic root of 2945309 is about 143.3431535847.

The spelling of 2945309 in words is "two million, nine hundred forty-five thousand, three hundred nine".