189945347 has 4 divisors (see below), whose sum is σ = 191826096. Its totient is φ = 188064600.

The previous prime is 189945341. The next prime is 189945361. The reversal of 189945347 is 743549981.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 743549981 = 101 ⋅7361881.

It is a cyclic number.

It is not a de Polignac number, because 189945347 - 2¹⁰ = 189944323 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 189945295 and 189945304.

It is not an unprimeable number, because it can be changed into a prime (189945341) 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, 940223 + ... + 940424.

It is an arithmetic number, because the mean of its divisors is an integer number (47956524).

Almost surely, 2^189945347 is an apocalyptic number.

189945347 is a deficient number, since it is larger than the sum of its proper divisors (1880749).

189945347 is a wasteful number, since it uses less digits than its factorization.

189945347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1880748.

The product of its digits is 1088640, while the sum is 50.

The square root of 189945347 is about 13782.0661368316. The cubic root of 189945347 is about 574.8345807712.

The spelling of 189945347 in words is "one hundred eighty-nine million, nine hundred forty-five thousand, three hundred forty-seven".