3099613721 has 2 divisors, whose sum is σ = 3099613722. Its totient is φ = 3099613720.

The previous prime is 3099613667. The next prime is 3099613747. The reversal of 3099613721 is 1273169903.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2745760000 + 353853721 = 52400^2 + 18811^2 .

It is a cyclic number.

It is not a de Polignac number, because 3099613721 - 2¹⁰ = 3099612697 is a prime.

It is a super-2 number, since 2×3099613721² = 19215210438822931682, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (3099613921) 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, 1549806860 + 1549806861.

It is an arithmetic number, because the mean of its divisors is an integer number (1549806861).

Almost surely, 2^3099613721 is an apocalyptic number.

It is an amenable number.

3099613721 is a deficient number, since it is larger than the sum of its proper divisors (1).

3099613721 is an equidigital number, since it uses as much as digits as its factorization.

3099613721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 61236, while the sum is 41.

The square root of 3099613721 is about 55674.1746324092. The cubic root of 3099613721 is about 1458.0391705898.

The spelling of 3099613721 in words is "three billion, ninety-nine million, six hundred thirteen thousand, seven hundred twenty-one".