999241289 has 2 divisors, whose sum is σ = 999241290. Its totient is φ = 999241288.

The previous prime is 999241273. The next prime is 999241297. The reversal of 999241289 is 982142999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 880605625 + 118635664 = 29675^2 + 10892^2 .

It is a cyclic number.

It is not a de Polignac number, because 999241289 - 2⁴ = 999241273 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 999241289.

It is not a weakly prime, because it can be changed into another prime (999241219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499620644 + 499620645.

It is an arithmetic number, because the mean of its divisors is an integer number (499620645).

Almost surely, 2^999241289 is an apocalyptic number.

It is an amenable number.

999241289 is a deficient number, since it is larger than the sum of its proper divisors (1).

999241289 is an equidigital number, since it uses as much as digits as its factorization.

999241289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 839808, while the sum is 53.

The square root of 999241289 is about 31610.7780511648. The cubic root of 999241289 is about 999.7470323461.

The spelling of 999241289 in words is "nine hundred ninety-nine million, two hundred forty-one thousand, two hundred eighty-nine".