9791014021 has 2 divisors, whose sum is σ = 9791014022. Its totient is φ = 9791014020.

The previous prime is 9791014007. The next prime is 9791014027. The reversal of 9791014021 is 1204101979.

9791014021 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4976597025 + 4814416996 = 70545^2 + 69386^2 .

It is an emirp because it is prime and its reverse (1204101979) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9791014021 - 2¹⁹ = 9790489733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9791014027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4895507010 + 4895507011.

It is an arithmetic number, because the mean of its divisors is an integer number (4895507011).

Almost surely, 2^9791014021 is an apocalyptic number.

It is an amenable number.

9791014021 is a deficient number, since it is larger than the sum of its proper divisors (1).

9791014021 is an equidigital number, since it uses as much as digits as its factorization.

9791014021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 34.

The square root of 9791014021 is about 98949.5529095508. The cubic root of 9791014021 is about 2139.3206873019.

The spelling of 9791014021 in words is "nine billion, seven hundred ninety-one million, fourteen thousand, twenty-one".