8999997 has 4 divisors (see below), whose sum is σ = 12000000.
Its totient is φ = 5999996.
The previous prime is 8999993. The next prime is 9000011. The reversal of 8999997 is 7999998.
Subtracting from 8999997 its reverse (7999998), we obtain a palindrome (999999).
It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.
It is a cyclic number.
It is not a de Polignac number, because 8999997 - 22 = 8999993 is a prime.
8999997 is a lucky number.
It is a self number, because there is not a number n which added to its sum of digits gives 8999997.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (8999993) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1499997 + ... + 1500002.
It is an arithmetic number, because the mean of its divisors is an integer number (3000000).
Almost surely, 28999997 is an apocalyptic number.
It is an amenable number.
8999997 is a deficient number, since it is larger than the sum of its proper divisors (3000003).
8999997 is a wasteful number, since it uses less digits than its factorization.
8999997 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 3000002.
The product of its digits is 3306744, while the sum is 60.
The square root of 8999997 is about 2999.9995000000.
Note that the first 3 decimals coincide.
The cubic root of 8999997 is about 208.0083591931.
The spelling of 8999997 in words is "eight million, nine hundred ninety-nine thousand, nine hundred ninety-seven".