3229969721 has 4 divisors (see below), whose sum is σ = 3523603344. Its totient is φ = 2936336100.

The previous prime is 3229969711. The next prime is 3229969727. The reversal of 3229969721 is 1279699223.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1279699223 = 11 ⋅116336293.

It is a cyclic number.

It is not a de Polignac number, because 3229969721 - 2¹⁰ = 3229968697 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 3229969721.

It is not an unprimeable number, because it can be changed into a prime (3229969727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146816795 + ... + 146816816.

It is an arithmetic number, because the mean of its divisors is an integer number (880900836).

Almost surely, 2^3229969721 is an apocalyptic number.

It is an amenable number.

3229969721 is a deficient number, since it is larger than the sum of its proper divisors (293633623).

3229969721 is a wasteful number, since it uses less digits than its factorization.

3229969721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293633622.

The product of its digits is 734832, while the sum is 50.

The square root of 3229969721 is about 56832.8225675973. The cubic root of 3229969721 is about 1478.1987035114.

The spelling of 3229969721 in words is "three billion, two hundred twenty-nine million, nine hundred sixty-nine thousand, seven hundred twenty-one".