189027643 has 16 divisors (see below), whose sum is σ = 222436800. Its totient is φ = 160556928.

The previous prime is 189027623. The next prime is 189027647. The reversal of 189027643 is 346720981.

189027643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-189027643 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 189027596 and 189027605.

It is not an unprimeable number, because it can be changed into a prime (189027647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36321 + ... + 41197.

It is an arithmetic number, because the mean of its divisors is an integer number (13902300).

Almost surely, 2^189027643 is an apocalyptic number.

189027643 is a deficient number, since it is larger than the sum of its proper divisors (33409157).

189027643 is an equidigital number, since it uses as much as digits as its factorization.

189027643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5011 (or 4997 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 189027643 is about 13748.7324142991. The cubic root of 189027643 is about 573.9073318576.

The spelling of 189027643 in words is "one hundred eighty-nine million, twenty-seven thousand, six hundred forty-three".