199996597 has 2 divisors, whose sum is σ = 199996598.
Its totient is φ = 199996596.
The previous prime is 199996583. The next prime is 199996627. The reversal of 199996597 is 795699991.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 185204881 + 14791716 = 13609^2 + 3846^2
It is an emirp because it is prime and its reverse (795699991) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 199996597 - 211 = 199994549 is a prime.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (199996297) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99998298 + 99998299.
It is an arithmetic number, because the mean of its divisors is an integer number (99998299).
Almost surely, 2199996597 is an apocalyptic number.
It is an amenable number.
199996597 is a deficient number, since it is larger than the sum of its proper divisors (1).
199996597 is an equidigital number, since it uses as much as digits as its factorization.
199996597 is an evil number, because the sum of its binary digits is even.
The product of its digits is 12400290, while the sum is 64.
The square root of 199996597 is about 14142.0153090003.
The cubic root of 199996597 is about 584.8002308130.
The spelling of 199996597 in words is "one hundred ninety-nine million, nine hundred ninety-six thousand, five hundred ninety-seven".