199974562717 has 4 divisors (see below), whose sum is σ = 201434231196. Its totient is φ = 198514894240.

The previous prime is 199974562699. The next prime is 199974562751. The reversal of 199974562717 is 717265479991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 717265479991 = 827 ⋅867310133.

It can be written as a sum of positive squares in 2 ways, for example, as 102926114041 + 97048448676 = 320821^2 + 311526^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199974562717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199974562787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 729834034 + ... + 729834307.

It is an arithmetic number, because the mean of its divisors is an integer number (50358557799).

Almost surely, 2^199974562717 is an apocalyptic number.

It is an amenable number.

199974562717 is a deficient number, since it is larger than the sum of its proper divisors (1459668479).

199974562717 is a wasteful number, since it uses less digits than its factorization.

199974562717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1459668478.

The product of its digits is 60011280, while the sum is 67.

The spelling of 199974562717 in words is "one hundred ninety-nine billion, nine hundred seventy-four million, five hundred sixty-two thousand, seven hundred seventeen".