8321881 has 2 divisors, whose sum is σ = 8321882. Its totient is φ = 8321880.

The previous prime is 8321861. The next prime is 8321897. The reversal of 8321881 is 1881238.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5569600 + 2752281 = 2360^2 + 1659^2 .

It is a cyclic number.

It is not a de Polignac number, because 8321881 - 2¹¹ = 8319833 is a prime.

It is a super-2 number, since 2×8321881² = 138507406756322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (8321801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4160940 + 4160941.

It is an arithmetic number, because the mean of its divisors is an integer number (4160941).

Almost surely, 2^8321881 is an apocalyptic number.

It is an amenable number.

8321881 is a deficient number, since it is larger than the sum of its proper divisors (1).

8321881 is an equidigital number, since it uses as much as digits as its factorization.

8321881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3072, while the sum is 31.

The square root of 8321881 is about 2884.7670616533. The cubic root of 8321881 is about 202.6471500688.

The spelling of 8321881 in words is "eight million, three hundred twenty-one thousand, eight hundred eighty-one".