3079721 has 2 divisors, whose sum is σ = 3079722. Its totient is φ = 3079720.

The previous prime is 3079717. The next prime is 3079751. The reversal of 3079721 is 1279703.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2676496 + 403225 = 1636^2 + 635^2 .

It is an emirp because it is prime and its reverse (1279703) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3079721 - 2² = 3079717 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (3079711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1539860 + 1539861.

It is an arithmetic number, because the mean of its divisors is an integer number (1539861).

Almost surely, 2^3079721 is an apocalyptic number.

It is an amenable number.

3079721 is a deficient number, since it is larger than the sum of its proper divisors (1).

3079721 is an equidigital number, since it uses as much as digits as its factorization.

3079721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2646, while the sum is 29.

The square root of 3079721 is about 1754.9133881762. The cubic root of 3079721 is about 145.4913336280.

The spelling of 3079721 in words is "three million, seventy-nine thousand, seven hundred twenty-one".