991244 has 6 divisors (see below), whose sum is σ = 1734684. Its totient is φ = 495620.

The previous prime is 991229. The next prime is 991261. The reversal of 991244 is 442199.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 991244.

It is an unprimeable number.

991244 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 (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123902 + ... + 123909.

It is an arithmetic number, because the mean of its divisors is an integer number (289114).

2⁹⁹¹²⁴⁴ is an apocalyptic number.

It is an amenable number.

991244 is a deficient number, since it is larger than the sum of its proper divisors (743440).

991244 is a wasteful number, since it uses less digits than its factorization.

991244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247815 (or 247813 counting only the distinct ones).

The product of its digits is 2592, while the sum is 29.

The square root of 991244 is about 995.6123743707. The cubic root of 991244 is about 99.7072773036.

The spelling of 991244 in words is "nine hundred ninety-one thousand, two hundred forty-four".