306005449 has 2 divisors, whose sum is σ = 306005450. Its totient is φ = 306005448.

The previous prime is 306005443. The next prime is 306005459. The reversal of 306005449 is 944500603.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 306005049 + 400 = 17493^2 + 20^2 .

It is a cyclic number.

It is not a de Polignac number, because 306005449 - 2⁵ = 306005417 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 306005449.

It is not a weakly prime, because it can be changed into another prime (306005443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 153002724 + 153002725.

It is an arithmetic number, because the mean of its divisors is an integer number (153002725).

Almost surely, 2^306005449 is an apocalyptic number.

It is an amenable number.

306005449 is a deficient number, since it is larger than the sum of its proper divisors (1).

306005449 is an equidigital number, since it uses as much as digits as its factorization.

306005449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 306005449 is about 17493.0114331410. The cubic root of 306005449 is about 673.8704099458.

The spelling of 306005449 in words is "three hundred six million, five thousand, four hundred forty-nine".