399271006171 has 2 divisors, whose sum is σ = 399271006172. Its totient is φ = 399271006170.

The previous prime is 399271006163. The next prime is 399271006193. The reversal of 399271006171 is 171600172993.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 399271006171 - 2³ = 399271006163 is a prime.

It is not a weakly prime, because it can be changed into another prime (399271009171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199635503085 + 199635503086.

It is an arithmetic number, because the mean of its divisors is an integer number (199635503086).

Almost surely, 2^399271006171 is an apocalyptic number.

399271006171 is a deficient number, since it is larger than the sum of its proper divisors (1).

399271006171 is an equidigital number, since it uses as much as digits as its factorization.

399271006171 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 142884, while the sum is 46.

The spelling of 399271006171 in words is "three hundred ninety-nine billion, two hundred seventy-one million, six thousand, one hundred seventy-one".