7720013 has 16 divisors (see below), whose sum is σ = 9295104. Its totient is φ = 6272640.

The previous prime is 7720001. The next prime is 7720021. The reversal of 7720013 is 3100277.

It is a cyclic number.

It is not a de Polignac number, because 7720013 - 2⁴ = 7719997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7720093) 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 15 ways as a sum of consecutive naturals, for example, 10256 + ... + 10982.

It is an arithmetic number, because the mean of its divisors is an integer number (580944).

Almost surely, 2^7720013 is an apocalyptic number.

It is an amenable number.

7720013 is a deficient number, since it is larger than the sum of its proper divisors (1575091).

7720013 is a wasteful number, since it uses less digits than its factorization.

7720013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 812.

The product of its (nonzero) digits is 294, while the sum is 20.

The square root of 7720013 is about 2778.4911372902. The cubic root of 7720013 is about 197.6390133839.

The spelling of 7720013 in words is "seven million, seven hundred twenty thousand, thirteen".