189144181 has 2 divisors, whose sum is σ = 189144182. Its totient is φ = 189144180.

The previous prime is 189144169. The next prime is 189144199. The reversal of 189144181 is 181441981.

189144181 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 173343556 + 15800625 = 13166^2 + 3975^2 .

It is a cyclic number.

It is not a de Polignac number, because 189144181 - 2²³ = 180755573 is a prime.

It is a super-2 number, since 2×189144181² = 71551042412321522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 189144181.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189144101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94572090 + 94572091.

It is an arithmetic number, because the mean of its divisors is an integer number (94572091).

Almost surely, 2^189144181 is an apocalyptic number.

It is an amenable number.

189144181 is a deficient number, since it is larger than the sum of its proper divisors (1).

189144181 is an equidigital number, since it uses as much as digits as its factorization.

189144181 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9216, while the sum is 37.

The square root of 189144181 is about 13752.9698974440. The cubic root of 189144181 is about 574.0252480730.

The spelling of 189144181 in words is "one hundred eighty-nine million, one hundred forty-four thousand, one hundred eighty-one".