8638947 has 16 divisors (see below), whose sum is σ = 13042080. Its totient is φ = 5649696.

The previous prime is 8638937. The next prime is 8638951. The reversal of 8638947 is 7498368.

It is a happy number.

8638947 is a `hidden beast` number, since 8 + 638 + 9 + 4 + 7 = 666.

8638947 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 8638947 - 2⁸ = 8638691 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8638937) 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, 1588 + ... + 4449.

It is an arithmetic number, because the mean of its divisors is an integer number (815130).

Almost surely, 2^8638947 is an apocalyptic number.

8638947 is a deficient number, since it is larger than the sum of its proper divisors (4403133).

8638947 is a wasteful number, since it uses less digits than its factorization.

8638947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6099 (or 6093 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 8638947 is about 2939.2085669445. The cubic root of 8638947 is about 205.1887771298.

It can be divided in two parts, 86389 and 47, that added together give a square (86436 = 294²).

The spelling of 8638947 in words is "eight million, six hundred thirty-eight thousand, nine hundred forty-seven".