189541181 has 2 divisors, whose sum is σ = 189541182. Its totient is φ = 189541180.

The previous prime is 189541171. The next prime is 189541193. The reversal of 189541181 is 181145981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 96727225 + 92813956 = 9835^2 + 9634^2 .

It is a cyclic number.

It is not a de Polignac number, because 189541181 - 2⁶ = 189541117 is a prime.

It is a super-2 number, since 2×189541181² = 71851718589749522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189541111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94770590 + 94770591.

It is an arithmetic number, because the mean of its divisors is an integer number (94770591).

Almost surely, 2^189541181 is an apocalyptic number.

It is an amenable number.

189541181 is a deficient number, since it is larger than the sum of its proper divisors (1).

189541181 is an equidigital number, since it uses as much as digits as its factorization.

189541181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11520, while the sum is 38.

The square root of 189541181 is about 13767.3955779588. The cubic root of 189541181 is about 574.4265799525.

The spelling of 189541181 in words is "one hundred eighty-nine million, five hundred forty-one thousand, one hundred eighty-one".