189886143 has 4 divisors (see below), whose sum is σ = 253181528. Its totient is φ = 126590760.

The previous prime is 189886139. The next prime is 189886153. The reversal of 189886143 is 341688981.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 189886143 - 2² = 189886139 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 189886092 and 189886101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189886153) 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, 31647688 + ... + 31647693.

It is an arithmetic number, because the mean of its divisors is an integer number (63295382).

Almost surely, 2^189886143 is an apocalyptic number.

189886143 is a deficient number, since it is larger than the sum of its proper divisors (63295385).

189886143 is an equidigital number, since it uses as much as digits as its factorization.

189886143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63295384.

The product of its digits is 331776, while the sum is 48.

The square root of 189886143 is about 13779.9181057073. The cubic root of 189886143 is about 574.7748512340.

The spelling of 189886143 in words is "one hundred eighty-nine million, eight hundred eighty-six thousand, one hundred forty-three".