189865073 has 4 divisors (see below), whose sum is σ = 192152688. Its totient is φ = 187577460.

The previous prime is 189865063. The next prime is 189865087. The reversal of 189865073 is 370568981.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 370568981 = 2011 ⋅184271.

It is a cyclic number.

It is not a de Polignac number, because 189865073 - 2⁴ = 189865057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189865003) 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 in 3 ways as a sum of consecutive naturals, for example, 1143683 + ... + 1143848.

It is an arithmetic number, because the mean of its divisors is an integer number (48038172).

Almost surely, 2^189865073 is an apocalyptic number.

It is an amenable number.

189865073 is a deficient number, since it is larger than the sum of its proper divisors (2287615).

189865073 is an equidigital number, since it uses as much as digits as its factorization.

189865073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2287614.

The product of its (nonzero) digits is 362880, while the sum is 47.

The square root of 189865073 is about 13779.1535661665. The cubic root of 189865073 is about 574.7535912062.

The spelling of 189865073 in words is "one hundred eighty-nine million, eight hundred sixty-five thousand, seventy-three".