2191199 has 2 divisors, whose sum is σ = 2191200. Its totient is φ = 2191198.

The previous prime is 2191193. The next prime is 2191229. The reversal of 2191199 is 9911912.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2191199 - 2¹² = 2187103 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2191193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1095599 + 1095600.

It is an arithmetic number, because the mean of its divisors is an integer number (1095600).

2^2191199 is an apocalyptic number.

2191199 is a deficient number, since it is larger than the sum of its proper divisors (1).

2191199 is an equidigital number, since it uses as much as digits as its factorization.

2191199 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1458, while the sum is 32.

The square root of 2191199 is about 1480.2699078209. The cubic root of 2191199 is about 129.8854810021.

The spelling of 2191199 in words is "two million, one hundred ninety-one thousand, one hundred ninety-nine".