9772020913 has 2 divisors, whose sum is σ = 9772020914. Its totient is φ = 9772020912.

The previous prime is 9772020877. The next prime is 9772020919. The reversal of 9772020913 is 3190202779.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7050625024 + 2721395889 = 83968^2 + 52167^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9772020913 is a prime.

It is not a weakly prime, because it can be changed into another prime (9772020919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4886010456 + 4886010457.

It is an arithmetic number, because the mean of its divisors is an integer number (4886010457).

Almost surely, 2^9772020913 is an apocalyptic number.

It is an amenable number.

9772020913 is a deficient number, since it is larger than the sum of its proper divisors (1).

9772020913 is an equidigital number, since it uses as much as digits as its factorization.

9772020913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 47628, while the sum is 40.

The square root of 9772020913 is about 98853.5326278227. The cubic root of 9772020913 is about 2137.9364707576.

The spelling of 9772020913 in words is "nine billion, seven hundred seventy-two million, twenty thousand, nine hundred thirteen".