9991486 has 16 divisors (see below), whose sum is σ = 16007040. Its totient is φ = 4667040.

The previous prime is 9991469. The next prime is 9991489. The reversal of 9991486 is 6841999.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9991489) 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, 981 + ... + 4576.

It is an arithmetic number, because the mean of its divisors is an integer number (1000440).

Almost surely, 2^9991486 is an apocalyptic number.

9991486 is a deficient number, since it is larger than the sum of its proper divisors (6015554).

9991486 is a wasteful number, since it uses less digits than its factorization.

9991486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5619.

The product of its digits is 139968, while the sum is 46.

The square root of 9991486 is about 3160.9311919116. The cubic root of 9991486 is about 215.3823087861.

It can be divided in two parts, 99914 and 86, that added together give a 5-th power (100000 = 10⁵).

The spelling of 9991486 in words is "nine million, nine hundred ninety-one thousand, four hundred eighty-six".