189131143 has 2 divisors, whose sum is σ = 189131144. Its totient is φ = 189131142.

The previous prime is 189131123. The next prime is 189131147. The reversal of 189131143 is 341131981.

It is a strong prime.

It is an emirp because it is prime and its reverse (341131981) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189131143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189131147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94565571 + 94565572.

It is an arithmetic number, because the mean of its divisors is an integer number (94565572).

Almost surely, 2^189131143 is an apocalyptic number.

189131143 is a deficient number, since it is larger than the sum of its proper divisors (1).

189131143 is an equidigital number, since it uses as much as digits as its factorization.

189131143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 31.

The square root of 189131143 is about 13752.4958825662. The cubic root of 189131143 is about 574.0120582881.

The spelling of 189131143 in words is "one hundred eighty-nine million, one hundred thirty-one thousand, one hundred forty-three".