8312985 has 12 divisors (see below), whose sum is σ = 14409252. Its totient is φ = 4433568.

The previous prime is 8312981. The next prime is 8312987. The reversal of 8312985 is 5892138.

It can be written as a sum of positive squares in 2 ways, for example, as 2893401 + 5419584 = 1701^2 + 2328^2 .

It is not a de Polignac number, because 8312985 - 2² = 8312981 is a prime.

It is a super-2 number, since 2×8312985² = 138211439220450, which contains 22 as substring.

It is an Ulam number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8312981) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 92322 + ... + 92411.

It is an arithmetic number, because the mean of its divisors is an integer number (1200771).

Almost surely, 2^8312985 is an apocalyptic number.

It is an amenable number.

8312985 is a deficient number, since it is larger than the sum of its proper divisors (6096267).

8312985 is a wasteful number, since it uses less digits than its factorization.

8312985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184744 (or 184741 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 8312985 is about 2883.2247571079. The cubic root of 8312985 is about 202.5749151257.

The spelling of 8312985 in words is "eight million, three hundred twelve thousand, nine hundred eighty-five".