189315143 has 2 divisors, whose sum is σ = 189315144. Its totient is φ = 189315142.

The previous prime is 189315127. The next prime is 189315157. The reversal of 189315143 is 341513981.

It is a strong prime.

It is an emirp because it is prime and its reverse (341513981) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 189315143 - 2⁴ = 189315127 is a prime.

It is a super-2 number, since 2×189315143² = 71680446738220898, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189315173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94657571 + 94657572.

It is an arithmetic number, because the mean of its divisors is an integer number (94657572).

Almost surely, 2^189315143 is an apocalyptic number.

189315143 is a deficient number, since it is larger than the sum of its proper divisors (1).

189315143 is an equidigital number, since it uses as much as digits as its factorization.

189315143 is an odious number, because the sum of its binary digits is odd.

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

The square root of 189315143 is about 13759.1839510924. The cubic root of 189315143 is about 574.1981443105.

The spelling of 189315143 in words is "one hundred eighty-nine million, three hundred fifteen thousand, one hundred forty-three".