9747421 has 2 divisors, whose sum is σ = 9747422. Its totient is φ = 9747420.

The previous prime is 9747403. The next prime is 9747457. The reversal of 9747421 is 1247479.

9747421 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., 5707321 + 4040100 = 2389^2 + 2010^2 .

It is an emirp because it is prime and its reverse (1247479) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9747421 - 2⁷ = 9747293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9747401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4873710 + 4873711.

It is an arithmetic number, because the mean of its divisors is an integer number (4873711).

Almost surely, 2^9747421 is an apocalyptic number.

It is an amenable number.

9747421 is a deficient number, since it is larger than the sum of its proper divisors (1).

9747421 is an equidigital number, since it uses as much as digits as its factorization.

9747421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14112, while the sum is 34.

The square root of 9747421 is about 3122.0860013779. The cubic root of 9747421 is about 213.6140962072.

The spelling of 9747421 in words is "nine million, seven hundred forty-seven thousand, four hundred twenty-one".