199439048717 has 4 divisors (see below), whose sum is σ = 199471238076. Its totient is φ = 199406859360.

The previous prime is 199439048689. The next prime is 199439048723. The reversal of 199439048717 is 717840934991.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 97681876681 + 101757172036 = 312541^2 + 318994^2 .

It is a cyclic number.

It is not a de Polignac number, because 199439048717 - 2³⁶ = 130719571981 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 199439048717.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199439018717) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16085384 + ... + 16097777.

It is an arithmetic number, because the mean of its divisors is an integer number (49867809519).

Almost surely, 2^199439048717 is an apocalyptic number.

It is an amenable number.

199439048717 is a deficient number, since it is larger than the sum of its proper divisors (32189359).

199439048717 is an equidigital number, since it uses as much as digits as its factorization.

199439048717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32189358.

The product of its (nonzero) digits is 13716864, while the sum is 62.

The spelling of 199439048717 in words is "one hundred ninety-nine billion, four hundred thirty-nine million, forty-eight thousand, seven hundred seventeen".