999948317 has 2 divisors, whose sum is σ = 999948318. Its totient is φ = 999948316.

The previous prime is 999948289. The next prime is 999948319. The reversal of 999948317 is 713849999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 980065636 + 19882681 = 31306^2 + 4459^2 .

It is a cyclic number.

It is not a de Polignac number, because 999948317 - 2²² = 995754013 is a prime.

It is a super-2 number, since 2×999948317² = 1999793273342264978, which contains 22 as substring.

Together with 999948319, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999948319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499974158 + 499974159.

It is an arithmetic number, because the mean of its divisors is an integer number (499974159).

Almost surely, 2^999948317 is an apocalyptic number.

It is an amenable number.

999948317 is a deficient number, since it is larger than the sum of its proper divisors (1).

999948317 is an equidigital number, since it uses as much as digits as its factorization.

999948317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4408992, while the sum is 59.

The square root of 999948317 is about 31621.9594111434. The cubic root of 999948317 is about 999.9827720365.

The spelling of 999948317 in words is "nine hundred ninety-nine million, nine hundred forty-eight thousand, three hundred seventeen".