9891700689 has 64 divisors (see below), whose sum is σ = 15425077248. Its totient is φ = 5588352000.

The previous prime is 9891700673. The next prime is 9891700703. The reversal of 9891700689 is 9860071989.

It is not a de Polignac number, because 9891700689 - 2⁴ = 9891700673 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9891700619) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3530089 + ... + 3532889.

It is an arithmetic number, because the mean of its divisors is an integer number (241016832).

Almost surely, 2^9891700689 is an apocalyptic number.

It is an amenable number.

9891700689 is a deficient number, since it is larger than the sum of its proper divisors (5533376559).

9891700689 is a wasteful number, since it uses less digits than its factorization.

9891700689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2998.

The product of its (nonzero) digits is 1959552, while the sum is 57.

The square root of 9891700689 is about 99457.0293594173. The cubic root of 9891700689 is about 2146.6289836750.

The spelling of 9891700689 in words is "nine billion, eight hundred ninety-one million, seven hundred thousand, six hundred eighty-nine".