8193985 has 4 divisors (see below), whose sum is σ = 9832788. Its totient is φ = 6555184.

The previous prime is 8193961. The next prime is 8194007. The reversal of 8193985 is 5893918.

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 3489424 + 4704561 = 1868^2 + 2169^2 .

It is a cyclic number.

It is not a de Polignac number, because 8193985 - 2²¹ = 6096833 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 819394 + ... + 819403.

It is an arithmetic number, because the mean of its divisors is an integer number (2458197).

Almost surely, 2^8193985 is an apocalyptic number.

It is an amenable number.

8193985 is a deficient number, since it is larger than the sum of its proper divisors (1638803).

8193985 is a wasteful number, since it uses less digits than its factorization.

8193985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1638802.

The product of its digits is 77760, while the sum is 43.

The square root of 8193985 is about 2862.5137554255. The cubic root of 8193985 is about 201.6036488511.

The spelling of 8193985 in words is "eight million, one hundred ninety-three thousand, nine hundred eighty-five".