304009 has 2 divisors, whose sum is σ = 304010. Its totient is φ = 304008.

The previous prime is 303997. The next prime is 304013. The reversal of 304009 is 900403.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 222784 + 81225 = 472^2 + 285^2 .

It is a cyclic number.

It is not a de Polignac number, because 304009 - 2⁹ = 303497 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 303983 and 304001.

It is not a weakly prime, because it can be changed into another prime (304039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152004 + 152005.

It is an arithmetic number, because the mean of its divisors is an integer number (152005).

2³⁰⁴⁰⁰⁹ is an apocalyptic number.

It is an amenable number.

304009 is a deficient number, since it is larger than the sum of its proper divisors (1).

304009 is an equidigital number, since it uses as much as digits as its factorization.

304009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 304009 is about 551.3701116310. The cubic root of 304009 is about 67.2401716772.

The spelling of 304009 in words is "three hundred four thousand, nine".