8669947 has 16 divisors (see below), whose sum is σ = 10725120. Its totient is φ = 6890400.

The previous prime is 8669939. The next prime is 8669963. The reversal of 8669947 is 7499668.

8669947 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8669947 - 2³ = 8669939 is a prime.

8669947 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 8669947.

It is not an unprimeable number, because it can be changed into a prime (8669447) 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, 1122 + ... + 4312.

It is an arithmetic number, because the mean of its divisors is an integer number (670320).

Almost surely, 2^8669947 is an apocalyptic number.

8669947 is a deficient number, since it is larger than the sum of its proper divisors (2055173).

8669947 is a wasteful number, since it uses less digits than its factorization.

8669947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3234.

The product of its digits is 653184, while the sum is 49.

The square root of 8669947 is about 2944.4773729815. The cubic root of 8669947 is about 205.4339172993.

The spelling of 8669947 in words is "eight million, six hundred sixty-nine thousand, nine hundred forty-seven".