8548991 has 4 divisors (see below), whose sum is σ = 9326184. Its totient is φ = 7771800.

The previous prime is 8548987. The next prime is 8549027. The reversal of 8548991 is 1998458.

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

It is a cyclic number.

It is not a de Polignac number, because 8548991 - 2² = 8548987 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8548091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 388580 + ... + 388601.

It is an arithmetic number, because the mean of its divisors is an integer number (2331546).

Almost surely, 2^8548991 is an apocalyptic number.

8548991 is a deficient number, since it is larger than the sum of its proper divisors (777193).

8548991 is a wasteful number, since it uses less digits than its factorization.

8548991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 777192.

The product of its digits is 103680, while the sum is 44.

The square root of 8548991 is about 2923.8657629925. The cubic root of 8548991 is about 204.4740912054.

The spelling of 8548991 in words is "eight million, five hundred forty-eight thousand, nine hundred ninety-one".