9770021 has 2 divisors, whose sum is σ = 9770022. Its totient is φ = 9770020.

The previous prime is 9770017. The next prime is 9770039. The reversal of 9770021 is 1200779.

9770021 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8940100 + 829921 = 2990^2 + 911^2 .

It is an emirp because it is prime and its reverse (1200779) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9770021 - 2² = 9770017 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9770041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4885010 + 4885011.

It is an arithmetic number, because the mean of its divisors is an integer number (4885011).

Almost surely, 2^9770021 is an apocalyptic number.

It is an amenable number.

9770021 is a deficient number, since it is larger than the sum of its proper divisors (1).

9770021 is an equidigital number, since it uses as much as digits as its factorization.

9770021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 882, while the sum is 26.

The square root of 9770021 is about 3125.7032808634. The cubic root of 9770021 is about 213.7790612881.

The spelling of 9770021 in words is "nine million, seven hundred seventy thousand, twenty-one".