199079717 has 4 divisors (see below), whose sum is σ = 199670796. Its totient is φ = 198488640.

The previous prime is 199079689. The next prime is 199079731. The reversal of 199079717 is 717970991.

It is a happy number.

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 105493441 + 93586276 = 10271^2 + 9674^2 .

It is a cyclic number.

It is not a de Polignac number, because 199079717 - 2¹² = 199075621 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 (199079767) 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, 295034 + ... + 295707.

It is an arithmetic number, because the mean of its divisors is an integer number (49917699).

Almost surely, 2^199079717 is an apocalyptic number.

It is an amenable number.

199079717 is a deficient number, since it is larger than the sum of its proper divisors (591079).

199079717 is an equidigital number, since it uses as much as digits as its factorization.

199079717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 591078.

The product of its (nonzero) digits is 250047, while the sum is 50.

The square root of 199079717 is about 14109.5611909088. The cubic root of 199079717 is about 583.9051937252.

The spelling of 199079717 in words is "one hundred ninety-nine million, seventy-nine thousand, seven hundred seventeen".