71275020073 has 2 divisors, whose sum is σ = 71275020074. Its totient is φ = 71275020072.

The previous prime is 71275020071. The next prime is 71275020079. The reversal of 71275020073 is 37002057217.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70818257689 + 456762384 = 266117^2 + 21372^2 .

It is a cyclic number.

It is not a de Polignac number, because 71275020073 - 2¹ = 71275020071 is a prime.

Together with 71275020071, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (71275020071) 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, 35637510036 + 35637510037.

It is an arithmetic number, because the mean of its divisors is an integer number (35637510037).

Almost surely, 2^71275020073 is an apocalyptic number.

It is an amenable number.

71275020073 is a deficient number, since it is larger than the sum of its proper divisors (1).

71275020073 is an equidigital number, since it uses as much as digits as its factorization.

71275020073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20580, while the sum is 34.

The spelling of 71275020073 in words is "seventy-one billion, two hundred seventy-five million, twenty thousand, seventy-three".