8683991609 has 4 divisors (see below), whose sum is σ = 8684314704. Its totient is φ = 8683668516.

The previous prime is 8683991581. The next prime is 8683991621. The reversal of 8683991609 is 9061993868.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8683991609 - 2¹⁶ = 8683926073 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (8683991209) 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, 117167 + ... + 176340.

It is an arithmetic number, because the mean of its divisors is an integer number (2171078676).

Almost surely, 2^8683991609 is an apocalyptic number.

It is an amenable number.

8683991609 is a deficient number, since it is larger than the sum of its proper divisors (323095).

8683991609 is a wasteful number, since it uses less digits than its factorization.

8683991609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323094.

The product of its (nonzero) digits is 5038848, while the sum is 59.

The square root of 8683991609 is about 93187.9370358632. The cubic root of 8683991609 is about 2055.4478620051.

The spelling of 8683991609 in words is "eight billion, six hundred eighty-three million, nine hundred ninety-one thousand, six hundred nine".