8909147 has 4 divisors (see below), whose sum is σ = 9594480. Its totient is φ = 8223816.

The previous prime is 8909143. The next prime is 8909149. The reversal of 8909147 is 7419098.

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 8909147 - 2² = 8909143 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 8909147.

It is not an unprimeable number, because it can be changed into a prime (8909143) 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, 342647 + ... + 342672.

It is an arithmetic number, because the mean of its divisors is an integer number (2398620).

Almost surely, 2^8909147 is an apocalyptic number.

8909147 is a deficient number, since it is larger than the sum of its proper divisors (685333).

8909147 is a wasteful number, since it uses less digits than its factorization.

8909147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685332.

The product of its (nonzero) digits is 18144, while the sum is 38.

The square root of 8909147 is about 2984.8194250239. The cubic root of 8909147 is about 207.3060809866.

The spelling of 8909147 in words is "eight million, nine hundred nine thousand, one hundred forty-seven".