189081823 has 4 divisors (see below), whose sum is σ = 216093520. Its totient is φ = 162070128.

The previous prime is 189081811. The next prime is 189081829. The reversal of 189081823 is 328180981.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 328180981 = 467 ⋅702743.

It is a cyclic number.

It is not a de Polignac number, because 189081823 - 2²¹ = 186984671 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 (189081829) 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, 13505838 + ... + 13505851.

It is an arithmetic number, because the mean of its divisors is an integer number (54023380).

Almost surely, 2^189081823 is an apocalyptic number.

189081823 is a deficient number, since it is larger than the sum of its proper divisors (27011697).

189081823 is an equidigital number, since it uses as much as digits as its factorization.

189081823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27011696.

The product of its (nonzero) digits is 27648, while the sum is 40.

The square root of 189081823 is about 13750.7026365928. The cubic root of 189081823 is about 573.9621586339.

The spelling of 189081823 in words is "one hundred eighty-nine million, eighty-one thousand, eight hundred twenty-three".