320000999971 has 2 divisors, whose sum is σ = 320000999972. Its totient is φ = 320000999970.

The previous prime is 320000999953. The next prime is 320001000031. The reversal of 320000999971 is 179999000023.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 320000999971 - 2¹⁵ = 320000967203 is a prime.

It is not a weakly prime, because it can be changed into another prime (320000999921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160000499985 + 160000499986.

It is an arithmetic number, because the mean of its divisors is an integer number (160000499986).

Almost surely, 2^320000999971 is an apocalyptic number.

320000999971 is a deficient number, since it is larger than the sum of its proper divisors (1).

320000999971 is an equidigital number, since it uses as much as digits as its factorization.

320000999971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 275562, while the sum is 49.

Adding to 320000999971 its reverse (179999000023), we get a palindrome (499999999994).

The spelling of 320000999971 in words is "three hundred twenty billion, nine hundred ninety-nine thousand, nine hundred seventy-one".