189967943 has 6 divisors (see below), whose sum is σ = 208807872. Its totient is φ = 172698020.

The previous prime is 189967933. The next prime is 189967949. The reversal of 189967943 is 349769981.

It is not a de Polignac number, because 189967943 - 2¹² = 189963847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189967949) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 784871 + ... + 785112.

It is an arithmetic number, because the mean of its divisors is an integer number (34801312).

Almost surely, 2^189967943 is an apocalyptic number.

189967943 is a deficient number, since it is larger than the sum of its proper divisors (18839929).

189967943 is a wasteful number, since it uses less digits than its factorization.

189967943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1570005 (or 1569994 counting only the distinct ones).

The product of its digits is 2939328, while the sum is 56.

The square root of 189967943 is about 13782.8858734301. The cubic root of 189967943 is about 574.8573740771.

The spelling of 189967943 in words is "one hundred eighty-nine million, nine hundred sixty-seven thousand, nine hundred forty-three".