8691809099 has 4 divisors (see below), whose sum is σ = 8692124136. Its totient is φ = 8691494064.

The previous prime is 8691809069. The next prime is 8691809107. The reversal of 8691809099 is 9909081968.

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

It is a cyclic number.

It is not a de Polignac number, because 8691809099 - 2⁸ = 8691808843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8691809069) 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, 111689 + ... + 172794.

It is an arithmetic number, because the mean of its divisors is an integer number (2173031034).

Almost surely, 2^8691809099 is an apocalyptic number.

8691809099 is a deficient number, since it is larger than the sum of its proper divisors (315037).

8691809099 is a wasteful number, since it uses less digits than its factorization.

8691809099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315036.

The product of its (nonzero) digits is 2519424, while the sum is 59.

The square root of 8691809099 is about 93229.8723532324. The cubic root of 8691809099 is about 2056.0644610890.

The spelling of 8691809099 in words is "eight billion, six hundred ninety-one million, eight hundred nine thousand, ninety-nine".