6330991309 has 2 divisors, whose sum is σ = 6330991310. Its totient is φ = 6330991308.

The previous prime is 6330991243. The next prime is 6330991313. The reversal of 6330991309 is 9031990336.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5748975684 + 582015625 = 75822^2 + 24125^2 .

It is a cyclic number.

It is not a de Polignac number, because 6330991309 - 2⁹ = 6330990797 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6330991409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3165495654 + 3165495655.

It is an arithmetic number, because the mean of its divisors is an integer number (3165495655).

Almost surely, 2^6330991309 is an apocalyptic number.

It is an amenable number.

6330991309 is a deficient number, since it is larger than the sum of its proper divisors (1).

6330991309 is an equidigital number, since it uses as much as digits as its factorization.

6330991309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 118098, while the sum is 43.

The square root of 6330991309 is about 79567.5267241605. The cubic root of 6330991309 is about 1849.9382798011.

The spelling of 6330991309 in words is "six billion, three hundred thirty million, nine hundred ninety-one thousand, three hundred nine".