9420720613 has 2 divisors, whose sum is σ = 9420720614. Its totient is φ = 9420720612.

The previous prime is 9420720611. The next prime is 9420720671. The reversal of 9420720613 is 3160270249.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6134335684 + 3286384929 = 78322^2 + 57327^2 .

It is a cyclic number.

It is not a de Polignac number, because 9420720613 - 2¹ = 9420720611 is a prime.

Together with 9420720611, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9420720611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4710360306 + 4710360307.

It is an arithmetic number, because the mean of its divisors is an integer number (4710360307).

Almost surely, 2^9420720613 is an apocalyptic number.

It is an amenable number.

9420720613 is a deficient number, since it is larger than the sum of its proper divisors (1).

9420720613 is an equidigital number, since it uses as much as digits as its factorization.

9420720613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 9420720613 is about 97060.3967280167. The cubic root of 9420720613 is about 2112.0038623768.

The spelling of 9420720613 in words is "nine billion, four hundred twenty million, seven hundred twenty thousand, six hundred thirteen".