199144237 has 2 divisors, whose sum is σ = 199144238. Its totient is φ = 199144236.

The previous prime is 199144213. The next prime is 199144243. The reversal of 199144237 is 732441991.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122301481 + 76842756 = 11059^2 + 8766^2 .

It is a cyclic number.

It is not a de Polignac number, because 199144237 - 2¹¹ = 199142189 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 199144237.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199144207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99572118 + 99572119.

It is an arithmetic number, because the mean of its divisors is an integer number (99572119).

Almost surely, 2^199144237 is an apocalyptic number.

It is an amenable number.

199144237 is a deficient number, since it is larger than the sum of its proper divisors (1).

199144237 is an equidigital number, since it uses as much as digits as its factorization.

199144237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 40.

The square root of 199144237 is about 14111.8473985513. The cubic root of 199144237 is about 583.9682664389.

The spelling of 199144237 in words is "one hundred ninety-nine million, one hundred forty-four thousand, two hundred thirty-seven".