304990913 has 2 divisors, whose sum is σ = 304990914. Its totient is φ = 304990912.

The previous prime is 304990877. The next prime is 304990919. The reversal of 304990913 is 319099403.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 304572304 + 418609 = 17452^2 + 647^2 .

It is a cyclic number.

It is not a de Polignac number, because 304990913 - 2⁸ = 304990657 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (304990919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152495456 + 152495457.

It is an arithmetic number, because the mean of its divisors is an integer number (152495457).

Almost surely, 2^304990913 is an apocalyptic number.

It is an amenable number.

304990913 is a deficient number, since it is larger than the sum of its proper divisors (1).

304990913 is an equidigital number, since it uses as much as digits as its factorization.

304990913 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26244, while the sum is 38.

The square root of 304990913 is about 17463.9890345820. The cubic root of 304990913 is about 673.1248646914.

The spelling of 304990913 in words is "three hundred four million, nine hundred ninety thousand, nine hundred thirteen".