189423291 has 8 divisors (see below), whose sum is σ = 252664384. Its totient is φ = 126232200.

The previous prime is 189423287. The next prime is 189423307. The reversal of 189423291 is 192324981.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 189423291 - 2² = 189423287 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189423281) 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 7 ways as a sum of consecutive naturals, for example, 2521 + ... + 19626.

It is an arithmetic number, because the mean of its divisors is an integer number (31583048).

Almost surely, 2^189423291 is an apocalyptic number.

189423291 is a deficient number, since it is larger than the sum of its proper divisors (63241093).

189423291 is a wasteful number, since it uses less digits than its factorization.

189423291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25001.

The product of its digits is 31104, while the sum is 39.

The square root of 189423291 is about 13763.1134195719. The cubic root of 189423291 is about 574.3074621370.

The spelling of 189423291 in words is "one hundred eighty-nine million, four hundred twenty-three thousand, two hundred ninety-one".