8398993 has 2 divisors, whose sum is σ = 8398994. Its totient is φ = 8398992.

The previous prime is 8398967. The next prime is 8398997. The reversal of 8398993 is 3998938.

8398993 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., 7795264 + 603729 = 2792^2 + 777^2 .

It is a cyclic number.

It is not a de Polignac number, because 8398993 - 2⁵ = 8398961 is a prime.

It is not a weakly prime, because it can be changed into another prime (8398997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4199496 + 4199497.

It is an arithmetic number, because the mean of its divisors is an integer number (4199497).

Almost surely, 2^8398993 is an apocalyptic number.

It is an amenable number.

8398993 is a deficient number, since it is larger than the sum of its proper divisors (1).

8398993 is an equidigital number, since it uses as much as digits as its factorization.

8398993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 419904, while the sum is 49.

The square root of 8398993 is about 2898.1016200265. The cubic root of 8398993 is about 203.2711479341.

The spelling of 8398993 in words is "eight million, three hundred ninety-eight thousand, nine hundred ninety-three".