291199 has 2 divisors, whose sum is σ = 291200. Its totient is φ = 291198.

The previous prime is 291191. The next prime is 291209. The reversal of 291199 is 991192.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 291199 - 2³ = 291191 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 291199.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 291199.

It is not a weakly prime, because it can be changed into another prime (291191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 145599 + 145600.

It is an arithmetic number, because the mean of its divisors is an integer number (145600).

2²⁹¹¹⁹⁹ is an apocalyptic number.

291199 is a deficient number, since it is larger than the sum of its proper divisors (1).

291199 is an equidigital number, since it uses as much as digits as its factorization.

291199 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1458, while the sum is 31.

The square root of 291199 is about 539.6285759668. The cubic root of 291199 is about 66.2821559811.

The spelling of 291199 in words is "two hundred ninety-one thousand, one hundred ninety-nine".