9398422421 has 2 divisors, whose sum is σ = 9398422422. Its totient is φ = 9398422420.

The previous prime is 9398422417. The next prime is 9398422433. The reversal of 9398422421 is 1242248939.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5762935396 + 3635487025 = 75914^2 + 60295^2 .

It is a cyclic number.

It is not a de Polignac number, because 9398422421 - 2² = 9398422417 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9398428421) 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, 4699211210 + 4699211211.

It is an arithmetic number, because the mean of its divisors is an integer number (4699211211).

Almost surely, 2^9398422421 is an apocalyptic number.

It is an amenable number.

9398422421 is a deficient number, since it is larger than the sum of its proper divisors (1).

9398422421 is an equidigital number, since it uses as much as digits as its factorization.

9398422421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 248832, while the sum is 44.

The square root of 9398422421 is about 96945.4610644562. The cubic root of 9398422421 is about 2110.3362237579.

The spelling of 9398422421 in words is "nine billion, three hundred ninety-eight million, four hundred twenty-two thousand, four hundred twenty-one".