199197 has 6 divisors (see below), whose sum is σ = 287742. Its totient is φ = 132792.

The previous prime is 199193. The next prime is 199207. The reversal of 199197 is 791991.

It can be written as a sum of positive squares in only one way, i.e., 168921 + 30276 = 411^2 + 174^2 .

It is not a de Polignac number, because 199197 - 2² = 199193 is a prime.

199197 is a lucky number.

It is a nialpdrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199193) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11058 + ... + 11075.

It is an arithmetic number, because the mean of its divisors is an integer number (47957).

2¹⁹⁹¹⁹⁷ is an apocalyptic number.

It is an amenable number.

199197 is a deficient number, since it is larger than the sum of its proper divisors (88545).

199197 is a wasteful number, since it uses less digits than its factorization.

199197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22139 (or 22136 counting only the distinct ones).

The product of its digits is 5103, while the sum is 36.

The square root of 199197 is about 446.3149112454. The cubic root of 199197 is about 58.4019835756.

It can be divided in two parts, 19 and 9197, that added together give a square (9216 = 96²).

The spelling of 199197 in words is "one hundred ninety-nine thousand, one hundred ninety-seven".