199201097 has 4 divisors (see below), whose sum is σ = 201028740. Its totient is φ = 197373456.

The previous prime is 199201061. The next prime is 199201099. The reversal of 199201097 is 790102991.

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 167210761 + 31990336 = 12931^2 + 5656^2 .

It is a cyclic number.

It is not a de Polignac number, because 199201097 - 2²⁴ = 182423881 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 199201097.

It is not an unprimeable number, because it can be changed into a prime (199201099) 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, 913658 + ... + 913875.

It is an arithmetic number, because the mean of its divisors is an integer number (50257185).

Almost surely, 2^199201097 is an apocalyptic number.

It is an amenable number.

199201097 is a deficient number, since it is larger than the sum of its proper divisors (1827643).

199201097 is a wasteful number, since it uses less digits than its factorization.

199201097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1827642.

The product of its (nonzero) digits is 10206, while the sum is 38.

The square root of 199201097 is about 14113.8618740584. The cubic root of 199201097 is about 584.0238396864.

The spelling of 199201097 in words is "one hundred ninety-nine million, two hundred one thousand, ninety-seven".