71419973897 has 2 divisors, whose sum is σ = 71419973898. Its totient is φ = 71419973896.

The previous prime is 71419973893. The next prime is 71419974037. The reversal of 71419973897 is 79837991417.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67816493056 + 3603480841 = 260416^2 + 60029^2 .

It is a cyclic number.

It is not a de Polignac number, because 71419973897 - 2² = 71419973893 is a prime.

It is a super-2 number, since 2×71419973897² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (71419973893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35709986948 + 35709986949.

It is an arithmetic number, because the mean of its divisors is an integer number (35709986949).

Almost surely, 2^71419973897 is an apocalyptic number.

It is an amenable number.

71419973897 is a deficient number, since it is larger than the sum of its proper divisors (1).

71419973897 is an equidigital number, since it uses as much as digits as its factorization.

71419973897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24004512, while the sum is 65.

The spelling of 71419973897 in words is "seventy-one billion, four hundred nineteen million, nine hundred seventy-three thousand, eight hundred ninety-seven".