999929717 has 2 divisors, whose sum is σ = 999929718. Its totient is φ = 999929716.

The previous prime is 999929683. The next prime is 999929731. The reversal of 999929717 is 717929999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 985897201 + 14032516 = 31399^2 + 3746^2 .

It is a cyclic number.

It is not a de Polignac number, because 999929717 - 2¹⁴ = 999913333 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 999929717.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999929737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499964858 + 499964859.

It is an arithmetic number, because the mean of its divisors is an integer number (499964859).

Almost surely, 2^999929717 is an apocalyptic number.

It is an amenable number.

999929717 is a deficient number, since it is larger than the sum of its proper divisors (1).

999929717 is an equidigital number, since it uses as much as digits as its factorization.

999929717 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5786802, while the sum is 62.

The square root of 999929717 is about 31621.6653103533. The cubic root of 999929717 is about 999.9765717845.

The spelling of 999929717 in words is "nine hundred ninety-nine million, nine hundred twenty-nine thousand, seven hundred seventeen".