999817241 has 2 divisors, whose sum is σ = 999817242.
Its totient is φ = 999817240.
The previous prime is 999817201. The next prime is 999817249. The reversal of 999817241 is 142718999.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 990990400 + 8826841 = 31480^2 + 2971^2
It is an emirp because it is prime and its reverse (142718999) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 999817241 - 222 = 995622937 is a prime.
It is a self number, because there is not a number n which added to its sum of digits gives 999817241.
It is not a weakly prime, because it can be changed into another prime (999817249) 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, 499908620 + 499908621.
It is an arithmetic number, because the mean of its divisors is an integer number (499908621).
Almost surely, 2999817241 is an apocalyptic number.
It is an amenable number.
999817241 is a deficient number, since it is larger than the sum of its proper divisors (1).
999817241 is an equidigital number, since it uses as much as digits as its factorization.
999817241 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 326592, while the sum is 50.
The square root of 999817241 is about 31619.8867961288.
The cubic root of 999817241 is about 999.9390766218.
The spelling of 999817241 in words is "nine hundred ninety-nine million, eight hundred seventeen thousand, two hundred forty-one".