3199721 has 8 divisors (see below), whose sum is σ = 3676800. Its totient is φ = 2727648.

The previous prime is 3199709. The next prime is 3199741. The reversal of 3199721 is 1279913.

It is a happy number.

3199721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3199721 - 2¹⁴ = 3183337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3199741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 245 + ... + 2541.

It is an arithmetic number, because the mean of its divisors is an integer number (459600).

Almost surely, 2^3199721 is an apocalyptic number.

It is an amenable number.

3199721 is a deficient number, since it is larger than the sum of its proper divisors (477079).

3199721 is a wasteful number, since it uses less digits than its factorization.

3199721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2503.

The product of its digits is 3402, while the sum is 32.

The square root of 3199721 is about 1788.7763974293. The cubic root of 3199721 is about 147.3569771345.

The spelling of 3199721 in words is "three million, one hundred ninety-nine thousand, seven hundred twenty-one".