189845723 has 4 divisors (see below), whose sum is σ = 190019880. Its totient is φ = 189671568.

The previous prime is 189845717. The next prime is 189845741. The reversal of 189845723 is 327548981.

It is a happy number.

189845723 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 327548981 = 6269 ⋅52249.

It is a cyclic number.

It is not a de Polignac number, because 189845723 - 2⁴ = 189845707 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189845753) 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, 85433 + ... + 87626.

It is an arithmetic number, because the mean of its divisors is an integer number (47504970).

Almost surely, 2^189845723 is an apocalyptic number.

189845723 is a deficient number, since it is larger than the sum of its proper divisors (174157).

189845723 is a wasteful number, since it uses less digits than its factorization.

189845723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174156.

The product of its digits is 483840, while the sum is 47.

The square root of 189845723 is about 13778.4514006473. The cubic root of 189845723 is about 574.7340653052.

The spelling of 189845723 in words is "one hundred eighty-nine million, eight hundred forty-five thousand, seven hundred twenty-three".