9028181 has 2 divisors, whose sum is σ = 9028182. Its totient is φ = 9028180.

The previous prime is 9028141. The next prime is 9028231. The reversal of 9028181 is 1818209.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7612081 + 1416100 = 2759^2 + 1190^2 .

It is an emirp because it is prime and its reverse (1818209) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9028181 - 2²² = 4833877 is a prime.

It is a super-2 number, since 2×9028181² = 163016104337522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9028141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4514090 + 4514091.

It is an arithmetic number, because the mean of its divisors is an integer number (4514091).

Almost surely, 2^9028181 is an apocalyptic number.

It is an amenable number.

9028181 is a deficient number, since it is larger than the sum of its proper divisors (1).

9028181 is an equidigital number, since it uses as much as digits as its factorization.

9028181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 29.

The square root of 9028181 is about 3004.6931623712. The cubic root of 9028181 is about 208.2252629184.

The spelling of 9028181 in words is "nine million, twenty-eight thousand, one hundred eighty-one".