9991494 has 12 divisors (see below), whose sum is σ = 21648276. Its totient is φ = 3330492.

The previous prime is 9991489. The next prime is 9991543. The reversal of 9991494 is 4941999.

It is a congruent number.

It is an unprimeable 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 5 ways as a sum of consecutive naturals, for example, 277524 + ... + 277559.

It is an arithmetic number, because the mean of its divisors is an integer number (1804023).

Almost surely, 2^9991494 is an apocalyptic number.

9991494 is an abundant number, since it is smaller than the sum of its proper divisors (11656782).

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

9991494 is a wasteful number, since it uses less digits than its factorization.

9991494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555091 (or 555088 counting only the distinct ones).

The product of its digits is 104976, while the sum is 45.

The square root of 9991494 is about 3160.9324573613. The cubic root of 9991494 is about 215.3823662703.

The spelling of 9991494 in words is "nine million, nine hundred ninety-one thousand, four hundred ninety-four".