91199 has 2 divisors, whose sum is σ = 91200.
Its totient is φ = 91198.
The previous prime is 91193. The next prime is 91229. The reversal of 91199 is 99119.
It is a weak prime.
It is an emirp because it is prime and its reverse (99119) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 91199 - 24 = 91183 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 (91193) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45599 + 45600.
It is an arithmetic number, because the mean of its divisors is an integer number (45600).
291199 is an apocalyptic number.
91199 is a deficient number, since it is larger than the sum of its proper divisors (1).
91199 is an equidigital number, since it uses as much as digits as its factorization.
91199 is an evil number, because the sum of its binary digits is even.
The product of its digits is 729, while the sum is 29.
The square root of 91199 is about 301.9917217408.
The cubic root of 91199 is about 45.0121777741.
The spelling of 91199 in words is "ninety-one thousand, one hundred ninety-nine".