889240181 has 2 divisors, whose sum is σ = 889240182. Its totient is φ = 889240180.

The previous prime is 889240117. The next prime is 889240189. The reversal of 889240181 is 181042988.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 512297956 + 376942225 = 22634^2 + 19415^2 .

It is a cyclic number.

It is not a de Polignac number, because 889240181 - 2⁶ = 889240117 is a prime.

It is a super-2 number, since 2×889240181² = 1581496199009825522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (889240189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 444620090 + 444620091.

It is an arithmetic number, because the mean of its divisors is an integer number (444620091).

Almost surely, 2^889240181 is an apocalyptic number.

It is an amenable number.

889240181 is a deficient number, since it is larger than the sum of its proper divisors (1).

889240181 is an equidigital number, since it uses as much as digits as its factorization.

889240181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36864, while the sum is 41.

The square root of 889240181 is about 29820.1304658447. The cubic root of 889240181 is about 961.6263595802.

The spelling of 889240181 in words is "eight hundred eighty-nine million, two hundred forty thousand, one hundred eighty-one".