189856873 has 8 divisors (see below), whose sum is σ = 200957120. Its totient is φ = 178867440.

The previous prime is 189856819. The next prime is 189856883. The reversal of 189856873 is 378658981.

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

It is a cyclic number.

It is not a de Polignac number, because 189856873 - 2²⁵ = 156302441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189856883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24165 + ... + 31042.

It is an arithmetic number, because the mean of its divisors is an integer number (25119640).

Almost surely, 2^189856873 is an apocalyptic number.

It is an amenable number.

189856873 is a deficient number, since it is larger than the sum of its proper divisors (11100247).

189856873 is a wasteful number, since it uses less digits than its factorization.

189856873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55407.

The product of its digits is 2903040, while the sum is 55.

The square root of 189856873 is about 13778.8560120207. The cubic root of 189856873 is about 574.7453168262.

The spelling of 189856873 in words is "one hundred eighty-nine million, eight hundred fifty-six thousand, eight hundred seventy-three".