189977123 has 8 divisors (see below), whose sum is σ = 219733248. Its totient is φ = 160875144.

The previous prime is 189977113. The next prime is 189977153. The reversal of 189977123 is 321779981.

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 189977123 - 2⁴ = 189977107 is a prime.

It is not an unprimeable number, because it can be changed into a prime (189977113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 162911 + ... + 164072.

It is an arithmetic number, because the mean of its divisors is an integer number (27466656).

Almost surely, 2^189977123 is an apocalyptic number.

189977123 is a deficient number, since it is larger than the sum of its proper divisors (29756125).

189977123 is an equidigital number, since it uses as much as digits as its factorization.

189977123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327073.

The product of its digits is 190512, while the sum is 47.

The square root of 189977123 is about 13783.2188911009. The cubic root of 189977123 is about 574.8666337195.

The spelling of 189977123 in words is "one hundred eighty-nine million, nine hundred seventy-seven thousand, one hundred twenty-three".