9708421 has 2 divisors, whose sum is σ = 9708422. Its totient is φ = 9708420.

The previous prime is 9708397. The next prime is 9708451. The reversal of 9708421 is 1248079.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8767521 + 940900 = 2961^2 + 970^2 .

It is a cyclic number.

It is not a de Polignac number, because 9708421 - 2¹¹ = 9706373 is a prime.

It is an Ulam number.

It is a nialpdrome in base 15.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9708451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4854210 + 4854211.

It is an arithmetic number, because the mean of its divisors is an integer number (4854211).

Almost surely, 2^9708421 is an apocalyptic number.

It is an amenable number.

9708421 is a deficient number, since it is larger than the sum of its proper divisors (1).

9708421 is an equidigital number, since it uses as much as digits as its factorization.

9708421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 9708421 is about 3115.8339172684. The cubic root of 9708421 is about 213.3288212479.

The spelling of 9708421 in words is "nine million, seven hundred eight thousand, four hundred twenty-one".