189561323 has 24 divisors (see below), whose sum is σ = 225840384. Its totient is φ = 155844000.

The previous prime is 189561299. The next prime is 189561419. The reversal of 189561323 is 323165981.

It is a happy number.

It is not a de Polignac number, because 189561323 - 2⁶ = 189561259 is a prime.

It is not an unprimeable number, because it can be changed into a prime (189561223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1255298 + ... + 1255448.

It is an arithmetic number, because the mean of its divisors is an integer number (9410016).

Almost surely, 2^189561323 is an apocalyptic number.

189561323 is a deficient number, since it is larger than the sum of its proper divisors (36279061).

189561323 is a wasteful number, since it uses less digits than its factorization.

189561323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363 (or 326 counting only the distinct ones).

The product of its digits is 38880, while the sum is 38.

The square root of 189561323 is about 13768.1270694310. The cubic root of 189561323 is about 574.4469267891.

The spelling of 189561323 in words is "one hundred eighty-nine million, five hundred sixty-one thousand, three hundred twenty-three".