8491994 has 16 divisors (see below), whose sum is σ = 14856000. Its totient is φ = 3639132.

The previous prime is 8491969. The next prime is 8492039. The reversal of 8491994 is 4991948.

It is a super-2 number, since 2×8491994² = 144227924192072, which contains 22 as substring.

It is an Ulam 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 7 ways as a sum of consecutive naturals, for example, 5504 + ... + 6875.

It is an arithmetic number, because the mean of its divisors is an integer number (928500).

Almost surely, 2^8491994 is an apocalyptic number.

8491994 is a deficient number, since it is larger than the sum of its proper divisors (6364006).

8491994 is a wasteful number, since it uses less digits than its factorization.

8491994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12402 (or 12388 counting only the distinct ones).

The product of its digits is 93312, while the sum is 44.

The square root of 8491994 is about 2914.1026062924. The cubic root of 8491994 is about 204.0186609868.

The spelling of 8491994 in words is "eight million, four hundred ninety-one thousand, nine hundred ninety-four".