189590549 has 2 divisors, whose sum is σ = 189590550. Its totient is φ = 189590548.

The previous prime is 189590543. The next prime is 189590551. The reversal of 189590549 is 945095981.

189590549 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 156700324 + 32890225 = 12518^2 + 5735^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189590549 is a prime.

Together with 189590551, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 189590497 and 189590506.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189590543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94795274 + 94795275.

It is an arithmetic number, because the mean of its divisors is an integer number (94795275).

Almost surely, 2^189590549 is an apocalyptic number.

It is an amenable number.

189590549 is a deficient number, since it is larger than the sum of its proper divisors (1).

189590549 is an equidigital number, since it uses as much as digits as its factorization.

189590549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 583200, while the sum is 50.

The square root of 189590549 is about 13769.1883929301. The cubic root of 189590549 is about 574.4764474439.

The spelling of 189590549 in words is "one hundred eighty-nine million, five hundred ninety thousand, five hundred forty-nine".