1199899 has 2 divisors, whose sum is σ = 1199900.
Its totient is φ = 1199898.
The previous prime is 1199893. The next prime is 1199909. The reversal of 1199899 is 9989911.
It is a weak prime.
It is a cyclic number.
It is not a de Polignac number, because 1199899 - 219 = 675611 is a prime.
It is a super-2 number, since 2×11998992 = 2879515220402, which contains 22 as substring.
It is not a weakly prime, because it can be changed into another prime (1199893) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 599949 + 599950.
It is an arithmetic number, because the mean of its divisors is an integer number (599950).
21199899 is an apocalyptic number.
1199899 is a deficient number, since it is larger than the sum of its proper divisors (1).
1199899 is an equidigital number, since it uses as much as digits as its factorization.
1199899 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 52488, while the sum is 46.
The square root of 1199899 is about 1095.3990140583.
The cubic root of 1199899 is about 106.2628754870.
Subtracting from 1199899 its product of digits (52488), we obtain a palindrome (1147411).
The spelling of 1199899 in words is "one million, one hundred ninety-nine thousand, eight hundred ninety-nine".