8423999 has 2 divisors, whose sum is σ = 8424000. Its totient is φ = 8423998.

The previous prime is 8423953. The next prime is 8424019. The reversal of 8423999 is 9993248.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8423999 - 2¹⁶ = 8358463 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8423929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4211999 + 4212000.

It is an arithmetic number, because the mean of its divisors is an integer number (4212000).

Almost surely, 2^8423999 is an apocalyptic number.

8423999 is a deficient number, since it is larger than the sum of its proper divisors (1).

8423999 is an equidigital number, since it uses as much as digits as its factorization.

8423999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 139968, while the sum is 44.

The square root of 8423999 is about 2902.4126171170. The cubic root of 8423999 is about 203.4726785295.

The spelling of 8423999 in words is "eight million, four hundred twenty-three thousand, nine hundred ninety-nine".