8477989 has 4 divisors (see below), whose sum is σ = 9130156. Its totient is φ = 7825824.

The previous prime is 8477983. The next prime is 8477999. The reversal of 8477989 is 9897748.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3392964 + 5085025 = 1842^2 + 2255^2 .

It is a cyclic number.

It is not a de Polignac number, because 8477989 - 2⁵ = 8477957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8477983) 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, 326064 + ... + 326089.

It is an arithmetic number, because the mean of its divisors is an integer number (2282539).

Almost surely, 2^8477989 is an apocalyptic number.

It is an amenable number.

8477989 is a deficient number, since it is larger than the sum of its proper divisors (652167).

8477989 is a wasteful number, since it uses less digits than its factorization.

8477989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 652166.

The product of its digits is 1016064, while the sum is 52.

The square root of 8477989 is about 2911.6986451211. The cubic root of 8477989 is about 203.9064433878.

It can be divided in two parts, 847 and 7989, that added together give a square (8836 = 94²).

The spelling of 8477989 in words is "eight million, four hundred seventy-seven thousand, nine hundred eighty-nine".