8985181 has 2 divisors, whose sum is σ = 8985182. Its totient is φ = 8985180.

The previous prime is 8985167. The next prime is 8985187. The reversal of 8985181 is 1815898.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6708100 + 2277081 = 2590^2 + 1509^2 .

It is a cyclic number.

It is not a de Polignac number, because 8985181 - 2⁵ = 8985149 is a prime.

It is a super-2 number, since 2×8985181² = 161466955205522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8985187) 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 as a sum of consecutive naturals, namely, 4492590 + 4492591.

It is an arithmetic number, because the mean of its divisors is an integer number (4492591).

Almost surely, 2^8985181 is an apocalyptic number.

It is an amenable number.

8985181 is a deficient number, since it is larger than the sum of its proper divisors (1).

8985181 is an equidigital number, since it uses as much as digits as its factorization.

8985181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23040, while the sum is 40.

The square root of 8985181 is about 2997.5291491493. The cubic root of 8985181 is about 207.8941538019.

The spelling of 8985181 in words is "eight million, nine hundred eighty-five thousand, one hundred eighty-one".