188891323 has 4 divisors (see below), whose sum is σ = 190159200. Its totient is φ = 187623448.

The previous prime is 188891309. The next prime is 188891357. The reversal of 188891323 is 323198881.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 188891323 - 2⁹ = 188890811 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 188891323.

It is not an unprimeable number, because it can be changed into a prime (188891363) 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, 633715 + ... + 634012.

It is an arithmetic number, because the mean of its divisors is an integer number (47539800).

Almost surely, 2^188891323 is an apocalyptic number.

188891323 is a deficient number, since it is larger than the sum of its proper divisors (1267877).

188891323 is a wasteful number, since it uses less digits than its factorization.

188891323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1267876.

The product of its digits is 82944, while the sum is 43.

The square root of 188891323 is about 13743.7739722392. The cubic root of 188891323 is about 573.7693381748.

The spelling of 188891323 in words is "one hundred eighty-eight million, eight hundred ninety-one thousand, three hundred twenty-three".