9790421 has 2 divisors, whose sum is σ = 9790422. Its totient is φ = 9790420.

The previous prime is 9790411. The next prime is 9790423. The reversal of 9790421 is 1240979.

9790421 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., 8916196 + 874225 = 2986^2 + 935^2 .

It is an emirp because it is prime and its reverse (1240979) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9790421 is a prime.

Together with 9790423, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p₆₅₁₆₅₉ and since 9790421 and 651659 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9790423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4895210 + 4895211.

It is an arithmetic number, because the mean of its divisors is an integer number (4895211).

Almost surely, 2^9790421 is an apocalyptic number.

It is an amenable number.

9790421 is a deficient number, since it is larger than the sum of its proper divisors (1).

9790421 is an equidigital number, since it uses as much as digits as its factorization.

9790421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 9790421 is about 3128.9648448009. The cubic root of 9790421 is about 213.9277495054.

The spelling of 9790421 in words is "nine million, seven hundred ninety thousand, four hundred twenty-one".