189808141 has 2 divisors, whose sum is σ = 189808142. Its totient is φ = 189808140.

The previous prime is 189808139. The next prime is 189808153. The reversal of 189808141 is 141808981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 188952516 + 855625 = 13746^2 + 925^2 .

It is an emirp because it is prime and its reverse (141808981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 189808141 - 2¹ = 189808139 is a prime.

Together with 189808139, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 189808094 and 189808103.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189808181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94904070 + 94904071.

It is an arithmetic number, because the mean of its divisors is an integer number (94904071).

Almost surely, 2^189808141 is an apocalyptic number.

It is an amenable number.

189808141 is a deficient number, since it is larger than the sum of its proper divisors (1).

189808141 is an equidigital number, since it uses as much as digits as its factorization.

189808141 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18432, while the sum is 40.

The square root of 189808141 is about 13777.0875369216. The cubic root of 189808141 is about 574.6961378753.

The spelling of 189808141 in words is "one hundred eighty-nine million, eight hundred eight thousand, one hundred forty-one".