999488717 has 2 divisors, whose sum is σ = 999488718. Its totient is φ = 999488716.

The previous prime is 999488657. The next prime is 999488723. The reversal of 999488717 is 717884999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 523768996 + 475719721 = 22886^2 + 21811^2 .

It is a cyclic number.

It is not a de Polignac number, because 999488717 - 2⁸ = 999488461 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 999488717.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999487717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499744358 + 499744359.

It is an arithmetic number, because the mean of its divisors is an integer number (499744359).

Almost surely, 2^999488717 is an apocalyptic number.

It is an amenable number.

999488717 is a deficient number, since it is larger than the sum of its proper divisors (1).

999488717 is an equidigital number, since it uses as much as digits as its factorization.

999488717 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9144576, while the sum is 62.

The square root of 999488717 is about 31614.6914740600. The cubic root of 999488717 is about 999.8295432795.

The spelling of 999488717 in words is "nine hundred ninety-nine million, four hundred eighty-eight thousand, seven hundred seventeen".