8397999 has 20 divisors (see below), whose sum is σ = 12632400. Its totient is φ = 5559840.

The previous prime is 8397971. The next prime is 8398003. The reversal of 8397999 is 9997938.

It is a happy number.

It is not a de Polignac number, because 8397999 - 2¹¹ = 8395951 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8397959) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 15859 + ... + 16379.

It is an arithmetic number, because the mean of its divisors is an integer number (631620).

Almost surely, 2^8397999 is an apocalyptic number.

8397999 is a deficient number, since it is larger than the sum of its proper divisors (4234401).

8397999 is a wasteful number, since it uses less digits than its factorization.

8397999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 732 (or 723 counting only the distinct ones).

The product of its digits is 1102248, while the sum is 54.

The square root of 8397999 is about 2897.9301233812. The cubic root of 8397999 is about 203.2631287390.

The spelling of 8397999 in words is "eight million, three hundred ninety-seven thousand, nine hundred ninety-nine".