30990313 has 2 divisors, whose sum is σ = 30990314. Its totient is φ = 30990312.

The previous prime is 30990307. The next prime is 30990329. The reversal of 30990313 is 31309903.

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., 21827584 + 9162729 = 4672^2 + 3027^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30990313 is a prime.

It is not a weakly prime, because it can be changed into another prime (30990353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15495156 + 15495157.

It is an arithmetic number, because the mean of its divisors is an integer number (15495157).

Almost surely, 2^30990313 is an apocalyptic number.

It is an amenable number.

30990313 is a deficient number, since it is larger than the sum of its proper divisors (1).

30990313 is an equidigital number, since it uses as much as digits as its factorization.

30990313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2187, while the sum is 28.

The square root of 30990313 is about 5566.8943765802. The cubic root of 30990313 is about 314.1053408041.

The spelling of 30990313 in words is "thirty million, nine hundred ninety thousand, three hundred thirteen".