999708971 has 2 divisors, whose sum is σ = 999708972. Its totient is φ = 999708970.

The previous prime is 999708917. The next prime is 999709003. The reversal of 999708971 is 179807999.

It is a happy number.

Together with previous prime (999708917) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 999708971 - 2⁶ = 999708907 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 999708971.

It is not a weakly prime, because it can be changed into another prime (999708071) 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, 499854485 + 499854486.

It is an arithmetic number, because the mean of its divisors is an integer number (499854486).

Almost surely, 2^999708971 is an apocalyptic number.

999708971 is a deficient number, since it is larger than the sum of its proper divisors (1).

999708971 is an equidigital number, since it uses as much as digits as its factorization.

999708971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2571912, while the sum is 59.

The square root of 999708971 is about 31618.1746943115. The cubic root of 999708971 is about 999.9029809209.

The spelling of 999708971 in words is "nine hundred ninety-nine million, seven hundred eight thousand, nine hundred seventy-one".