71428199971 has 2 divisors, whose sum is σ = 71428199972. Its totient is φ = 71428199970.

The previous prime is 71428199929. The next prime is 71428199981. The reversal of 71428199971 is 17999182417.

It is a strong prime.

It is an emirp because it is prime and its reverse (17999182417) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71428199971 - 2⁹ = 71428199459 is a prime.

It is not a weakly prime, because it can be changed into another prime (71428199981) 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, 35714099985 + 35714099986.

It is an arithmetic number, because the mean of its divisors is an integer number (35714099986).

Almost surely, 2^71428199971 is an apocalyptic number.

71428199971 is a deficient number, since it is larger than the sum of its proper divisors (1).

71428199971 is an equidigital number, since it uses as much as digits as its factorization.

71428199971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2286144, while the sum is 58.

The spelling of 71428199971 in words is "seventy-one billion, four hundred twenty-eight million, one hundred ninety-nine thousand, nine hundred seventy-one".