199868293 has 2 divisors, whose sum is σ = 199868294. Its totient is φ = 199868292.

The previous prime is 199868267. The next prime is 199868323. The reversal of 199868293 is 392868991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 117548964 + 82319329 = 10842^2 + 9073^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-199868293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199868243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99934146 + 99934147.

It is an arithmetic number, because the mean of its divisors is an integer number (99934147).

Almost surely, 2^199868293 is an apocalyptic number.

It is an amenable number.

199868293 is a deficient number, since it is larger than the sum of its proper divisors (1).

199868293 is an equidigital number, since it uses as much as digits as its factorization.

199868293 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1679616, while the sum is 55.

The square root of 199868293 is about 14137.4783112124. The cubic root of 199868293 is about 584.6751482519.

The spelling of 199868293 in words is "one hundred ninety-nine million, eight hundred sixty-eight thousand, two hundred ninety-three".