189007943 has 4 divisors (see below), whose sum is σ = 189035448. Its totient is φ = 188980440.

The previous prime is 189007939. The next prime is 189007963. The reversal of 189007943 is 349700981.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 189007943 - 2² = 189007939 is a prime.

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 189007943.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189007913) 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, 6380 + ... + 20462.

It is an arithmetic number, because the mean of its divisors is an integer number (47258862).

Almost surely, 2^189007943 is an apocalyptic number.

189007943 is a deficient number, since it is larger than the sum of its proper divisors (27505).

189007943 is a wasteful number, since it uses less digits than its factorization.

189007943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27504.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 189007943 is about 13748.0159659494. The cubic root of 189007943 is about 573.8873940907.

The spelling of 189007943 in words is "one hundred eighty-nine million, seven thousand, nine hundred forty-three".