3340539721 has 2 divisors, whose sum is σ = 3340539722. Its totient is φ = 3340539720.

The previous prime is 3340539691. The next prime is 3340539733. The reversal of 3340539721 is 1279350433.

It is a happy number.

3340539721 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., 1981585225 + 1358954496 = 44515^2 + 36864^2 .

It is an emirp because it is prime and its reverse (1279350433) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3340539721 - 2⁵ = 3340539689 is a prime.

It is a super-3 number, since 3×3340539721³ (a number of 30 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (3340539791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1670269860 + 1670269861.

It is an arithmetic number, because the mean of its divisors is an integer number (1670269861).

Almost surely, 2^3340539721 is an apocalyptic number.

It is an amenable number.

3340539721 is a deficient number, since it is larger than the sum of its proper divisors (1).

3340539721 is an equidigital number, since it uses as much as digits as its factorization.

3340539721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 68040, while the sum is 37.

The square root of 3340539721 is about 57797.4023724250. The cubic root of 3340539721 is about 1494.8772986846.

The spelling of 3340539721 in words is "three billion, three hundred forty million, five hundred thirty-nine thousand, seven hundred twenty-one".