9986493091 has 4 divisors (see below), whose sum is σ = 9986787000. Its totient is φ = 9986199184.

The previous prime is 9986493031. The next prime is 9986493113. The reversal of 9986493091 is 1903946899.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9986493091 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9986493031) 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, 88141 + ... + 166558.

It is an arithmetic number, because the mean of its divisors is an integer number (2496696750).

Almost surely, 2^9986493091 is an apocalyptic number.

9986493091 is a deficient number, since it is larger than the sum of its proper divisors (293909).

9986493091 is a wasteful number, since it uses less digits than its factorization.

9986493091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293908.

The product of its (nonzero) digits is 3779136, while the sum is 58.

The square root of 9986493091 is about 99932.4426350122. The cubic root of 9986493091 is about 2153.4642612074.

The spelling of 9986493091 in words is "nine billion, nine hundred eighty-six million, four hundred ninety-three thousand, ninety-one".