8947989 has 24 divisors (see below), whose sum is σ = 13995072. Its totient is φ = 5702400.

The previous prime is 8947987. The next prime is 8947997. The reversal of 8947989 is 9897498.

It is not a de Polignac number, because 8947989 - 2¹ = 8947987 is a prime.

It is a Curzon number.

8947989 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8947987) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4789 + ... + 6389.

It is an arithmetic number, because the mean of its divisors is an integer number (583128).

Almost surely, 2^8947989 is an apocalyptic number.

It is an amenable number.

8947989 is a deficient number, since it is larger than the sum of its proper divisors (5047083).

8947989 is a wasteful number, since it uses less digits than its factorization.

8947989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1639 (or 1627 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 54.

The square root of 8947989 is about 2991.3189398658. The cubic root of 8947989 is about 207.6069144678.

The spelling of 8947989 in words is "eight million, nine hundred forty-seven thousand, nine hundred eighty-nine".