8549881 has 2 divisors, whose sum is σ = 8549882. Its totient is φ = 8549880.

The previous prime is 8549857. The next prime is 8549887. The reversal of 8549881 is 1889458.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8037225 + 512656 = 2835^2 + 716^2 .

It is a cyclic number.

It is not a de Polignac number, because 8549881 - 2²¹ = 6452729 is a prime.

It is a super-3 number, since 3×8549881³ (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

8549881 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8549887) 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 as a sum of consecutive naturals, namely, 4274940 + 4274941.

It is an arithmetic number, because the mean of its divisors is an integer number (4274941).

Almost surely, 2^8549881 is an apocalyptic number.

It is an amenable number.

8549881 is a deficient number, since it is larger than the sum of its proper divisors (1).

8549881 is an equidigital number, since it uses as much as digits as its factorization.

8549881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 92160, while the sum is 43.

The square root of 8549881 is about 2924.0179548012. The cubic root of 8549881 is about 204.4811866091.

The spelling of 8549881 in words is "eight million, five hundred forty-nine thousand, eight hundred eighty-one".