189380291 has 2 divisors, whose sum is σ = 189380292. Its totient is φ = 189380290.

The previous prime is 189380273. The next prime is 189380293. The reversal of 189380291 is 192083981.

It is a strong prime.

It is an emirp because it is prime and its reverse (192083981) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189380291 is a prime.

Together with 189380293, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (189380293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94690145 + 94690146.

It is an arithmetic number, because the mean of its divisors is an integer number (94690146).

Almost surely, 2^189380291 is an apocalyptic number.

189380291 is a deficient number, since it is larger than the sum of its proper divisors (1).

189380291 is an equidigital number, since it uses as much as digits as its factorization.

189380291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 41.

The square root of 189380291 is about 13761.5511843687. The cubic root of 189380291 is about 574.2640019944.

The spelling of 189380291 in words is "one hundred eighty-nine million, three hundred eighty thousand, two hundred ninety-one".