199861267 has 2 divisors, whose sum is σ = 199861268. Its totient is φ = 199861266.

The previous prime is 199861241. The next prime is 199861279. The reversal of 199861267 is 762168991.

199861267 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 199861267 - 2⁷ = 199861139 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 199861267.

It is not a weakly prime, because it can be changed into another prime (199861667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99930633 + 99930634.

It is an arithmetic number, because the mean of its divisors is an integer number (99930634).

Almost surely, 2^199861267 is an apocalyptic number.

199861267 is a deficient number, since it is larger than the sum of its proper divisors (1).

199861267 is an equidigital number, since it uses as much as digits as its factorization.

199861267 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 49.

The square root of 199861267 is about 14137.2298205837. The cubic root of 199861267 is about 584.6682971139.

The spelling of 199861267 in words is "one hundred ninety-nine million, eight hundred sixty-one thousand, two hundred sixty-seven".