199880017 has 4 divisors (see below), whose sum is σ = 199934820. Its totient is φ = 199825216.

The previous prime is 199880003. The next prime is 199880069. The reversal of 199880017 is 710088991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 710088991 = 9419 ⋅75389.

It can be written as a sum of positive squares in 2 ways, for example, as 69372241 + 130507776 = 8329^2 + 11424^2 .

It is a cyclic number.

It is not a de Polignac number, because 199880017 - 2¹⁹ = 199355729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (199884017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21508 + ... + 29365.

It is an arithmetic number, because the mean of its divisors is an integer number (49983705).

Almost surely, 2^199880017 is an apocalyptic number.

It is an amenable number.

199880017 is a deficient number, since it is larger than the sum of its proper divisors (54803).

199880017 is an equidigital number, since it uses as much as digits as its factorization.

199880017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54802.

The product of its (nonzero) digits is 36288, while the sum is 43.

The square root of 199880017 is about 14137.8929476779. The cubic root of 199880017 is about 584.6865801092.

The spelling of 199880017 in words is "one hundred ninety-nine million, eight hundred eighty thousand, seventeen".