4099309 has 2 divisors, whose sum is σ = 4099310. Its totient is φ = 4099308.

The previous prime is 4099289. The next prime is 4099321. The reversal of 4099309 is 9039904.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2111209 + 1988100 = 1453^2 + 1410^2 .

It is a cyclic number.

It is not a de Polignac number, because 4099309 - 2⁹ = 4098797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4099339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2049654 + 2049655.

It is an arithmetic number, because the mean of its divisors is an integer number (2049655).

Almost surely, 2^4099309 is an apocalyptic number.

It is an amenable number.

4099309 is a deficient number, since it is larger than the sum of its proper divisors (1).

4099309 is an equidigital number, since it uses as much as digits as its factorization.

4099309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8748, while the sum is 34.

The square root of 4099309 is about 2024.6750356539. The cubic root of 4099309 is about 160.0430743402.

The spelling of 4099309 in words is "four million, ninety-nine thousand, three hundred nine".