991676 has 24 divisors (see below), whose sum is σ = 2007936. Its totient is φ = 419760.

The previous prime is 991663. The next prime is 991693. The reversal of 991676 is 676199.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 991676.

It is an unprimeable number.

991676 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2831 + ... + 3161.

It is an arithmetic number, because the mean of its divisors is an integer number (83664).

2⁹⁹¹⁶⁷⁶ is an apocalyptic number.

It is an amenable number.

991676 is an abundant number, since it is smaller than the sum of its proper divisors (1016260).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

991676 is a wasteful number, since it uses less digits than its factorization.

991676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449 (or 447 counting only the distinct ones).

The product of its digits is 20412, while the sum is 38.

The square root of 991676 is about 995.8293026418. The cubic root of 991676 is about 99.7217598757.

The spelling of 991676 in words is "nine hundred ninety-one thousand, six hundred seventy-six".