194985123 has 4 divisors (see below), whose sum is σ = 259980168. Its totient is φ = 129990080.

The previous prime is 194985103. The next prime is 194985127. The reversal of 194985123 is 321589491.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 321589491 = 3 ⋅107196497.

It is a cyclic number.

It is not a de Polignac number, because 194985123 - 2⁶ = 194985059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (194985127) 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 3 ways as a sum of consecutive naturals, for example, 32497518 + ... + 32497523.

It is an arithmetic number, because the mean of its divisors is an integer number (64995042).

Almost surely, 2^194985123 is an apocalyptic number.

194985123 is a deficient number, since it is larger than the sum of its proper divisors (64995045).

194985123 is an equidigital number, since it uses as much as digits as its factorization.

194985123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64995044.

The product of its digits is 77760, while the sum is 42.

The square root of 194985123 is about 13963.7073515596. The cubic root of 194985123 is about 579.8742523665.

The spelling of 194985123 in words is "one hundred ninety-four million, nine hundred eighty-five thousand, one hundred twenty-three".