8968181 has 2 divisors, whose sum is σ = 8968182. Its totient is φ = 8968180.

The previous prime is 8968153. The next prime is 8968187. The reversal of 8968181 is 1818698.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7102225 + 1865956 = 2665^2 + 1366^2 .

It is a cyclic number.

It is not a de Polignac number, because 8968181 - 2²² = 4773877 is a prime.

It is a super-2 number, since 2×8968181² = 160856540897522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8968187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4484090 + 4484091.

It is an arithmetic number, because the mean of its divisors is an integer number (4484091).

Almost surely, 2^8968181 is an apocalyptic number.

It is an amenable number.

8968181 is a deficient number, since it is larger than the sum of its proper divisors (1).

8968181 is an equidigital number, since it uses as much as digits as its factorization.

8968181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27648, while the sum is 41.

The square root of 8968181 is about 2994.6921377664. The cubic root of 8968181 is about 207.7629588240.

The spelling of 8968181 in words is "eight million, nine hundred sixty-eight thousand, one hundred eighty-one".