189131543 has 2 divisors, whose sum is σ = 189131544. Its totient is φ = 189131542.

The previous prime is 189131471. The next prime is 189131549. The reversal of 189131543 is 345131981.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 189131543 - 2¹² = 189127447 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189131549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94565771 + 94565772.

It is an arithmetic number, because the mean of its divisors is an integer number (94565772).

Almost surely, 2^189131543 is an apocalyptic number.

189131543 is a deficient number, since it is larger than the sum of its proper divisors (1).

189131543 is an equidigital number, since it uses as much as digits as its factorization.

189131543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12960, while the sum is 35.

The square root of 189131543 is about 13752.5104253733. The cubic root of 189131543 is about 574.0124629538.

The spelling of 189131543 in words is "one hundred eighty-nine million, one hundred thirty-one thousand, five hundred forty-three".