194425839 has 20 divisors (see below), whose sum is σ = 290968216. Its totient is φ = 129380976.

The previous prime is 194425789. The next prime is 194425843. The reversal of 194425839 is 938524491.

194425839 is a `hidden beast` number, since 194 + 425 + 8 + 39 = 666.

It is not a de Polignac number, because 194425839 - 2⁷ = 194425711 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 194425794 and 194425803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194425859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 50217 + ... + 53949.

Almost surely, 2^194425839 is an apocalyptic number.

194425839 is a deficient number, since it is larger than the sum of its proper divisors (96542377).

194425839 is an equidigital number, since it uses as much as digits as its factorization.

194425839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4388 (or 4379 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 194425839 is about 13943.6666268238. Note that the first 4 decimals coincide. The cubic root of 194425839 is about 579.3192955525.

It can be divided in two parts, 19442 and 5839, that added together give a square (25281 = 159²).

The spelling of 194425839 in words is "one hundred ninety-four million, four hundred twenty-five thousand, eight hundred thirty-nine".