8999447 has 4 divisors (see below), whose sum is σ = 9152040. Its totient is φ = 8846856.

The previous prime is 8999437. The next prime is 8999461. The reversal of 8999447 is 7449998.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 8999447 - 2⁶ = 8999383 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8999395 and 8999404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8999437) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76208 + ... + 76325.

It is an arithmetic number, because the mean of its divisors is an integer number (2288010).

Almost surely, 2^8999447 is an apocalyptic number.

8999447 is a deficient number, since it is larger than the sum of its proper divisors (152593).

8999447 is a wasteful number, since it uses less digits than its factorization.

8999447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152592.

The product of its digits is 653184, while the sum is 50.

The square root of 8999447 is about 2999.9078319175. The cubic root of 8999447 is about 208.0041218981.

The spelling of 8999447 in words is "eight million, nine hundred ninety-nine thousand, four hundred forty-seven".