199003755997 has 4 divisors (see below), whose sum is σ = 202758543900. Its totient is φ = 195248968096.

The previous prime is 199003755983. The next prime is 199003756139. The reversal of 199003755997 is 799557300991.

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 68661817156 + 130341938841 = 262034^2 + 361029^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199003755997 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 (199003785997) 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, 1877393872 + ... + 1877393977.

It is an arithmetic number, because the mean of its divisors is an integer number (50689635975).

Almost surely, 2^199003755997 is an apocalyptic number.

It is an amenable number.

199003755997 is a deficient number, since it is larger than the sum of its proper divisors (3754787903).

199003755997 is an equidigital number, since it uses as much as digits as its factorization.

199003755997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3754787902.

The product of its (nonzero) digits is 24111675, while the sum is 64.

The spelling of 199003755997 in words is "one hundred ninety-nine billion, three million, seven hundred fifty-five thousand, nine hundred ninety-seven".