8428393 has 2 divisors, whose sum is σ = 8428394. Its totient is φ = 8428392.

The previous prime is 8428391. The next prime is 8428403. The reversal of 8428393 is 3938248.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8082649 + 345744 = 2843^2 + 588^2 .

It is a cyclic number.

It is not a de Polignac number, because 8428393 - 2¹ = 8428391 is a prime.

Together with 8428391, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (8428391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4214196 + 4214197.

It is an arithmetic number, because the mean of its divisors is an integer number (4214197).

Almost surely, 2^8428393 is an apocalyptic number.

It is an amenable number.

8428393 is a deficient number, since it is larger than the sum of its proper divisors (1).

8428393 is an equidigital number, since it uses as much as digits as its factorization.

8428393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 37.

The square root of 8428393 is about 2903.1694749015. The cubic root of 8428393 is about 203.5080498358.

The spelling of 8428393 in words is "eight million, four hundred twenty-eight thousand, three hundred ninety-three".