199118137 has 2 divisors, whose sum is σ = 199118138. Its totient is φ = 199118136.

The previous prime is 199118131. The next prime is 199118159. The reversal of 199118137 is 731811991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 194295721 + 4822416 = 13939^2 + 2196^2 .

It is a cyclic number.

It is not a de Polignac number, because 199118137 - 2¹¹ = 199116089 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 199118137.

It is not a weakly prime, because it can be changed into another prime (199118131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99559068 + 99559069.

It is an arithmetic number, because the mean of its divisors is an integer number (99559069).

Almost surely, 2^199118137 is an apocalyptic number.

It is an amenable number.

199118137 is a deficient number, since it is larger than the sum of its proper divisors (1).

199118137 is an equidigital number, since it uses as much as digits as its factorization.

199118137 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13608, while the sum is 40.

The square root of 199118137 is about 14110.9226133517. The cubic root of 199118137 is about 583.9427535445.

It can be divided in two parts, 199 and 118137, that added together give a square (118336 = 344²).

The spelling of 199118137 in words is "one hundred ninety-nine million, one hundred eighteen thousand, one hundred thirty-seven".