3343648721 has 8 divisors (see below), whose sum is σ = 3899299200. Its totient is φ = 2865984324.

The previous prime is 3343648717. The next prime is 3343648729. The reversal of 3343648721 is 1278463433.

It is not a de Polignac number, because 3343648721 - 2² = 3343648717 is a prime.

It is a super-2 number, since 2×3343648721² = 22359973538889871682, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3343648729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4873781 + ... + 4874466.

It is an arithmetic number, because the mean of its divisors is an integer number (487412400).

Almost surely, 2^3343648721 is an apocalyptic number.

It is an amenable number.

3343648721 is a deficient number, since it is larger than the sum of its proper divisors (555650479).

3343648721 is an frugal number, since it uses more digits than its factorization.

3343648721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9748268 (or 9748254 counting only the distinct ones).

The product of its digits is 290304, while the sum is 41.

The square root of 3343648721 is about 57824.2917898698. The cubic root of 3343648721 is about 1495.3409096418.

The spelling of 3343648721 in words is "three billion, three hundred forty-three million, six hundred forty-eight thousand, seven hundred twenty-one".