8747999 has 16 divisors (see below), whose sum is σ = 10039680. Its totient is φ = 7555680.

The previous prime is 8747987. The next prime is 8748001. The reversal of 8747999 is 9997478.

It is a cyclic number.

It is not a de Polignac number, because 8747999 - 2⁸ = 8747743 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8747999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8747929) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26264 + ... + 26594.

It is an arithmetic number, because the mean of its divisors is an integer number (627480).

Almost surely, 2^8747999 is an apocalyptic number.

8747999 is a deficient number, since it is larger than the sum of its proper divisors (1291681).

8747999 is a wasteful number, since it uses less digits than its factorization.

8747999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470.

The product of its digits is 1143072, while the sum is 53.

The square root of 8747999 is about 2957.7016414777. The cubic root of 8747999 is about 206.0485558083.

It can be divided in two parts, 87479 and 99, that added together give a palindrome (87578).

The spelling of 8747999 in words is "eight million, seven hundred forty-seven thousand, nine hundred ninety-nine".