189211423 has 4 divisors (see below), whose sum is σ = 189360640. Its totient is φ = 189062208.

The previous prime is 189211403. The next prime is 189211441. The reversal of 189211423 is 324112981.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 324112981 = 1163 ⋅278687.

It is a cyclic number.

It is not a de Polignac number, because 189211423 - 2¹⁷ = 189080351 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 (189211403) 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, 72690 + ... + 75247.

It is an arithmetic number, because the mean of its divisors is an integer number (47340160).

Almost surely, 2^189211423 is an apocalyptic number.

189211423 is a deficient number, since it is larger than the sum of its proper divisors (149217).

189211423 is a wasteful number, since it uses less digits than its factorization.

189211423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149216.

The product of its digits is 3456, while the sum is 31.

The square root of 189211423 is about 13755.4143158249. The cubic root of 189211423 is about 574.0932632637.

The spelling of 189211423 in words is "one hundred eighty-nine million, two hundred eleven thousand, four hundred twenty-three".