7720000213 has 2 divisors, whose sum is σ = 7720000214. Its totient is φ = 7720000212.

The previous prime is 7720000201. The next prime is 7720000273. The reversal of 7720000213 is 3120000277.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6158011729 + 1561988484 = 78473^2 + 39522^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7720000213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7720000273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3860000106 + 3860000107.

It is an arithmetic number, because the mean of its divisors is an integer number (3860000107).

Almost surely, 2^7720000213 is an apocalyptic number.

It is an amenable number.

7720000213 is a deficient number, since it is larger than the sum of its proper divisors (1).

7720000213 is an equidigital number, since it uses as much as digits as its factorization.

7720000213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 588, while the sum is 22.

The square root of 7720000213 is about 87863.5317580622. The cubic root of 7720000213 is about 1976.3890426441.

The spelling of 7720000213 in words is "seven billion, seven hundred twenty million, two hundred thirteen", and thus it is an aban number.