302009 has 2 divisors, whose sum is σ = 302010. Its totient is φ = 302008.

The previous prime is 301999. The next prime is 302053. The reversal of 302009 is 900203.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 157609 + 144400 = 397^2 + 380^2 .

It is a cyclic number.

It is not a de Polignac number, because 302009 - 2⁴ = 301993 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 301984 and 302002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (302609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 151004 + 151005.

It is an arithmetic number, because the mean of its divisors is an integer number (151005).

2³⁰²⁰⁰⁹ is an apocalyptic number.

It is an amenable number.

302009 is a deficient number, since it is larger than the sum of its proper divisors (1).

302009 is an equidigital number, since it uses as much as digits as its factorization.

302009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54, while the sum is 14.

The square root of 302009 is about 549.5534550888. The cubic root of 302009 is about 67.0923949883.

The spelling of 302009 in words is "three hundred two thousand, nine".