189142843 has 4 divisors (see below), whose sum is σ = 195665040. Its totient is φ = 182620648.

The previous prime is 189142831. The next prime is 189142859. The reversal of 189142843 is 348241981.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 348241981 = 3847 ⋅90523.

It is a cyclic number.

It is not a de Polignac number, because 189142843 - 2¹³ = 189134651 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 189142796 and 189142805.

It is not an unprimeable number, because it can be changed into a prime (189142543) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3261055 + ... + 3261112.

It is an arithmetic number, because the mean of its divisors is an integer number (48916260).

Almost surely, 2^189142843 is an apocalyptic number.

189142843 is a deficient number, since it is larger than the sum of its proper divisors (6522197).

189142843 is an equidigital number, since it uses as much as digits as its factorization.

189142843 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6522196.

The product of its digits is 55296, while the sum is 40.

The square root of 189142843 is about 13752.9212533192. The cubic root of 189142843 is about 574.0238945242.

The spelling of 189142843 in words is "one hundred eighty-nine million, one hundred forty-two thousand, eight hundred forty-three".