8889581 has 2 divisors, whose sum is σ = 8889582. Its totient is φ = 8889580.

The previous prime is 8889571. The next prime is 8889607. The reversal of 8889581 is 1859888.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8649481 + 240100 = 2941^2 + 490^2 .

It is a cyclic number.

It is not a de Polignac number, because 8889581 - 2²² = 4695277 is a prime.

It is a super-2 number, since 2×8889581² = 158049300711122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8889571) 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, 4444790 + 4444791.

It is an arithmetic number, because the mean of its divisors is an integer number (4444791).

Almost surely, 2^8889581 is an apocalyptic number.

It is an amenable number.

8889581 is a deficient number, since it is larger than the sum of its proper divisors (1).

8889581 is an equidigital number, since it uses as much as digits as its factorization.

8889581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 184320, while the sum is 47.

The square root of 8889581 is about 2981.5400383024. The cubic root of 8889581 is about 207.1542099661.

The spelling of 8889581 in words is "eight million, eight hundred eighty-nine thousand, five hundred eighty-one".