194843138 has 16 divisors (see below), whose sum is σ = 351597120. Its totient is φ = 79109136.

The previous prime is 194843087. The next prime is 194843177. The reversal of 194843138 is 831348491.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 194843095 and 194843104.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 365981 + ... + 366512.

It is an arithmetic number, because the mean of its divisors is an integer number (21974820).

Almost surely, 2^194843138 is an apocalyptic number.

194843138 is a deficient number, since it is larger than the sum of its proper divisors (156753982).

194843138 is a wasteful number, since it uses less digits than its factorization.

194843138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 732521.

The product of its digits is 82944, while the sum is 41.

The square root of 194843138 is about 13958.6223532267. The cubic root of 194843138 is about 579.7334665172.

It can be divided in two parts, 19484 and 3138, that added together give a palindrome (22622).

The spelling of 194843138 in words is "one hundred ninety-four million, eight hundred forty-three thousand, one hundred thirty-eight".