3351909721 has 2 divisors, whose sum is σ = 3351909722. Its totient is φ = 3351909720.

The previous prime is 3351909709. The next prime is 3351909733. The reversal of 3351909721 is 1279091533.

3351909721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (3351909709) and next prime (3351909733).

It can be written as a sum of positive squares in only one way, i.e., 3348242496 + 3667225 = 57864^2 + 1915^2 .

It is a cyclic number.

It is not a de Polignac number, because 3351909721 - 2²³ = 3343521113 is a prime.

It is a super-2 number, since 2×3351909721² = 22470597555468595682, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3351909791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1675954860 + 1675954861.

It is an arithmetic number, because the mean of its divisors is an integer number (1675954861).

Almost surely, 2^3351909721 is an apocalyptic number.

It is an amenable number.

3351909721 is a deficient number, since it is larger than the sum of its proper divisors (1).

3351909721 is an equidigital number, since it uses as much as digits as its factorization.

3351909721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51030, while the sum is 40.

The square root of 3351909721 is about 57895.6796401942. The cubic root of 3351909721 is about 1496.5713869721.

The spelling of 3351909721 in words is "three billion, three hundred fifty-one million, nine hundred nine thousand, seven hundred twenty-one".