991486 has 8 divisors (see below), whose sum is σ = 1507824. Its totient is φ = 488880.

The previous prime is 991483. The next prime is 991493. The reversal of 991486 is 684199.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (991483) 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, 3250 + ... + 3541.

It is an arithmetic number, because the mean of its divisors is an integer number (188478).

2⁹⁹¹⁴⁸⁶ is an apocalyptic number.

991486 is a deficient number, since it is larger than the sum of its proper divisors (516338).

991486 is a wasteful number, since it uses less digits than its factorization.

991486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6866.

The product of its digits is 15552, while the sum is 37.

The square root of 991486 is about 995.7339001962. The cubic root of 991486 is about 99.7153907442.

It can be divided in two parts, 9914 and 86, that added together give a 4-th power (10000 = 10⁴).

The spelling of 991486 in words is "nine hundred ninety-one thousand, four hundred eighty-six".