8921688609 has 8 divisors (see below), whose sum is σ = 11896373632. Its totient is φ = 5947398000.

The previous prime is 8921688571. The next prime is 8921688619. The reversal of 8921688609 is 9068861298.

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

It is not a de Polignac number, because 8921688609 - 2⁸ = 8921688353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8921688619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41017 + ... + 139734.

It is an arithmetic number, because the mean of its divisors is an integer number (1487046704).

Almost surely, 2^8921688609 is an apocalyptic number.

It is an amenable number.

8921688609 is a deficient number, since it is larger than the sum of its proper divisors (2974685023).

8921688609 is a wasteful number, since it uses less digits than its factorization.

8921688609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197207.

The product of its (nonzero) digits is 2985984, while the sum is 57.

The square root of 8921688609 is about 94454.6907728780. The cubic root of 8921688609 is about 2074.0331187229.

The spelling of 8921688609 in words is "eight billion, nine hundred twenty-one million, six hundred eighty-eight thousand, six hundred nine".