189603943 has 8 divisors (see below), whose sum is σ = 197881200. Its totient is φ = 181442688.

The previous prime is 189603937. The next prime is 189603959. The reversal of 189603943 is 349306981.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189603943 is a prime.

It is a super-2 number, since 2×189603943² = 71899310402294498, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 189603943.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189603143) 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 7 ways as a sum of consecutive naturals, for example, 25653 + ... + 32206.

It is an arithmetic number, because the mean of its divisors is an integer number (24735150).

Almost surely, 2^189603943 is an apocalyptic number.

189603943 is a deficient number, since it is larger than the sum of its proper divisors (8277257).

189603943 is a wasteful number, since it uses less digits than its factorization.

189603943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58001.

The product of its (nonzero) digits is 139968, while the sum is 43.

The square root of 189603943 is about 13769.6747601387. The cubic root of 189603943 is about 574.4899754677.

The spelling of 189603943 in words is "one hundred eighty-nine million, six hundred three thousand, nine hundred forty-three".