8971985 has 8 divisors (see below), whose sum is σ = 11745216. Its totient is φ = 6525040.

The previous prime is 8971979. The next prime is 8972023. The reversal of 8971985 is 5891798.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 8971985 - 2⁴ = 8971969 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81509 + ... + 81618.

It is an arithmetic number, because the mean of its divisors is an integer number (1468152).

Almost surely, 2^8971985 is an apocalyptic number.

It is an amenable number.

8971985 is a deficient number, since it is larger than the sum of its proper divisors (2773231).

8971985 is a wasteful number, since it uses less digits than its factorization.

8971985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163143.

The product of its digits is 181440, while the sum is 47.

The square root of 8971985 is about 2995.3271941476. The cubic root of 8971985 is about 207.7923300190.

It can be divided in two parts, 897 and 1985, that added together give a palindrome (2882).

The spelling of 8971985 in words is "eight million, nine hundred seventy-one thousand, nine hundred eighty-five".