194519947 has 16 divisors (see below), whose sum is σ = 211046400. Its totient is φ = 178754400.

The previous prime is 194519921. The next prime is 194519957. The reversal of 194519947 is 749915491.

It is a cyclic number.

It is not a de Polignac number, because 194519947 - 2²³ = 186131339 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 194519947.

It is not an unprimeable number, because it can be changed into a prime (194519957) 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 15 ways as a sum of consecutive naturals, for example, 105322 + ... + 107152.

It is an arithmetic number, because the mean of its divisors is an integer number (13190400).

Almost surely, 2^194519947 is an apocalyptic number.

194519947 is a deficient number, since it is larger than the sum of its proper divisors (16526453).

194519947 is a wasteful number, since it uses less digits than its factorization.

194519947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2034.

The product of its digits is 408240, while the sum is 49.

The square root of 194519947 is about 13947.0407972444. The cubic root of 194519947 is about 579.4127498428.

The spelling of 194519947 in words is "one hundred ninety-four million, five hundred nineteen thousand, nine hundred forty-seven".