3337000721 has 2 divisors, whose sum is σ = 3337000722. Its totient is φ = 3337000720.

The previous prime is 3337000697. The next prime is 3337000729. The reversal of 3337000721 is 1270007333.

It is a happy number.

3337000721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2274240721 + 1062760000 = 47689^2 + 32600^2 .

It is a cyclic number.

It is not a de Polignac number, because 3337000721 - 2¹⁴ = 3336984337 is a prime.

It is a super-2 number, since 2×3337000721² = 22271147623909039682, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3337000729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1668500360 + 1668500361.

It is an arithmetic number, because the mean of its divisors is an integer number (1668500361).

Almost surely, 2^3337000721 is an apocalyptic number.

It is an amenable number.

3337000721 is a deficient number, since it is larger than the sum of its proper divisors (1).

3337000721 is an equidigital number, since it uses as much as digits as its factorization.

3337000721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2646, while the sum is 26.

The square root of 3337000721 is about 57766.7786967561. The cubic root of 3337000721 is about 1494.3492163460.

The spelling of 3337000721 in words is "three billion, three hundred thirty-seven million, seven hundred twenty-one", and thus it is an aban number.