999971004271 has 2 divisors, whose sum is σ = 999971004272. Its totient is φ = 999971004270.

The previous prime is 999971004257. The next prime is 999971004281. The reversal of 999971004271 is 172400179999.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 999971004271 - 2⁷ = 999971004143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999971004281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499985502135 + 499985502136.

It is an arithmetic number, because the mean of its divisors is an integer number (499985502136).

Almost surely, 2^999971004271 is an apocalyptic number.

999971004271 is a deficient number, since it is larger than the sum of its proper divisors (1).

999971004271 is an equidigital number, since it uses as much as digits as its factorization.

999971004271 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 58.

The spelling of 999971004271 in words is "nine hundred ninety-nine billion, nine hundred seventy-one million, four thousand, two hundred seventy-one".