8491894 has 4 divisors (see below), whose sum is σ = 12737844. Its totient is φ = 4245946.

The previous prime is 8491831. The next prime is 8491897. The reversal of 8491894 is 4981948.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×8491894² = 144224527414472, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 8491894.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8491897) 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 as a sum of consecutive naturals, namely, 2122972 + ... + 2122975.

It is an arithmetic number, because the mean of its divisors is an integer number (3184461).

Almost surely, 2^8491894 is an apocalyptic number.

8491894 is a deficient number, since it is larger than the sum of its proper divisors (4245950).

8491894 is a wasteful number, since it uses less digits than its factorization.

8491894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4245949.

The product of its digits is 82944, while the sum is 43.

The square root of 8491894 is about 2914.0854483011. The cubic root of 8491894 is about 204.0178601562.

The spelling of 8491894 in words is "eight million, four hundred ninety-one thousand, eight hundred ninety-four".