71973238787071 has 2 divisors, whose sum is σ = 71973238787072. Its totient is φ = 71973238787070.

The previous prime is 71973238787069. The next prime is 71973238787141. The reversal of 71973238787071 is 17078783237917.

It is a happy number.

It is an a-pointer prime, because the next prime (71973238787141) can be obtained adding 71973238787071 to its sum of digits (70).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71973238787071 - 2¹ = 71973238787069 is a prime.

Together with 71973238787069, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71973238787171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35986619393535 + 35986619393536.

It is an arithmetic number, because the mean of its divisors is an integer number (35986619393536).

Almost surely, 2^{71973238787071} is an apocalyptic number.

71973238787071 is a deficient number, since it is larger than the sum of its proper divisors (1).

71973238787071 is an equidigital number, since it uses as much as digits as its factorization.

71973238787071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 174254976, while the sum is 70.

The spelling of 71973238787071 in words is "seventy-one trillion, nine hundred seventy-three billion, two hundred thirty-eight million, seven hundred eighty-seven thousand, seventy-one".