3069721 has 4 divisors (see below), whose sum is σ = 3083472. Its totient is φ = 3055972.

The previous prime is 3069683. The next prime is 3069743. The reversal of 3069721 is 1279603.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3069721 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3069721.

It is not an unprimeable number, because it can be changed into a prime (3069791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6535 + ... + 6988.

It is an arithmetic number, because the mean of its divisors is an integer number (770868).

Almost surely, 2^3069721 is an apocalyptic number.

It is an amenable number.

3069721 is a deficient number, since it is larger than the sum of its proper divisors (13751).

3069721 is a wasteful number, since it uses less digits than its factorization.

3069721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13750.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 3069721 is about 1752.0619281293. The cubic root of 3069721 is about 145.3336904620. Note that the first 3 decimals are identical.

It can be divided in two parts, 30 and 69721, that added together give a triangular number (69751 = T₃₇₃).

The spelling of 3069721 in words is "three million, sixty-nine thousand, seven hundred twenty-one".