991484 has 24 divisors (see below), whose sum is σ = 1952160. Its totient is φ = 437184.

The previous prime is 991483. The next prime is 991493. The reversal of 991484 is 484199.

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 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, 782 + ... + 1610.

It is an arithmetic number, because the mean of its divisors is an integer number (81340).

2⁹⁹¹⁴⁸⁴ is an apocalyptic number.

It is an amenable number.

991484 is a deficient number, since it is larger than the sum of its proper divisors (960676).

991484 is a wasteful number, since it uses less digits than its factorization.

991484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 869 (or 867 counting only the distinct ones).

The product of its digits is 10368, while the sum is 35.

The square root of 991484 is about 995.7328959113. The cubic root of 991484 is about 99.7153236964.

The spelling of 991484 in words is "nine hundred ninety-one thousand, four hundred eighty-four".