189660841 has 4 divisors (see below), whose sum is σ = 196200900. Its totient is φ = 183120784.

The previous prime is 189660833. The next prime is 189660881. The reversal of 189660841 is 148066981.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 148066981 = 19 ⋅7792999.

It can be written as a sum of positive squares in 2 ways, for example, as 141705216 + 47955625 = 11904^2 + 6925^2 .

It is a cyclic number.

It is not a de Polignac number, because 189660841 - 2³ = 189660833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189660811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3269986 + ... + 3270043.

It is an arithmetic number, because the mean of its divisors is an integer number (49050225).

Almost surely, 2^189660841 is an apocalyptic number.

It is an amenable number.

189660841 is a deficient number, since it is larger than the sum of its proper divisors (6540059).

189660841 is an equidigital number, since it uses as much as digits as its factorization.

189660841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6540058.

The product of its (nonzero) digits is 82944, while the sum is 43.

The square root of 189660841 is about 13771.7406670326. The cubic root of 189660841 is about 574.5474357029.

The spelling of 189660841 in words is "one hundred eighty-nine million, six hundred sixty thousand, eight hundred forty-one".