304801309 has 2 divisors, whose sum is σ = 304801310. Its totient is φ = 304801308.

The previous prime is 304801283. The next prime is 304801319. The reversal of 304801309 is 903108403.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 267224409 + 37576900 = 16347^2 + 6130^2 .

It is a cyclic number.

It is not a de Polignac number, because 304801309 - 2⁷ = 304801181 is a prime.

It is a super-2 number, since 2×304801309² = 185807675936226962, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (304801319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152400654 + 152400655.

It is an arithmetic number, because the mean of its divisors is an integer number (152400655).

Almost surely, 2^304801309 is an apocalyptic number.

It is an amenable number.

304801309 is a deficient number, since it is larger than the sum of its proper divisors (1).

304801309 is an equidigital number, since it uses as much as digits as its factorization.

304801309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 304801309 is about 17458.5597630503. The cubic root of 304801309 is about 672.9853483781.

The spelling of 304801309 in words is "three hundred four million, eight hundred one thousand, three hundred nine".