8991473 has 8 divisors (see below), whose sum is σ = 9182208. Its totient is φ = 8802864.

The previous prime is 8991449. The next prime is 8991517. The reversal of 8991473 is 3741998.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8991473 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8991473.

It is not an unprimeable number, because it can be changed into a prime (8991443) 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, 10115 + ... + 10967.

It is an arithmetic number, because the mean of its divisors is an integer number (1147776).

Almost surely, 2^8991473 is an apocalyptic number.

8991473 is a gapful number since it is divisible by the number (83) formed by its first and last digit.

It is an amenable number.

8991473 is a deficient number, since it is larger than the sum of its proper divisors (190735).

8991473 is a wasteful number, since it uses less digits than its factorization.

8991473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1063.

The product of its digits is 54432, while the sum is 41.

The square root of 8991473 is about 2998.5784965547. The cubic root of 8991473 is about 207.9426694190.

The spelling of 8991473 in words is "eight million, nine hundred ninety-one thousand, four hundred seventy-three".