71306504197 has 2 divisors, whose sum is σ = 71306504198. Its totient is φ = 71306504196.

The previous prime is 71306504149. The next prime is 71306504263. The reversal of 71306504197 is 79140560317.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48386360961 + 22920143236 = 219969^2 + 151394^2 .

It is a cyclic number.

It is not a de Polignac number, because 71306504197 - 2²⁷ = 71172286469 is a prime.

It is a super-2 number, since 2×71306504197² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71306504117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35653252098 + 35653252099.

It is an arithmetic number, because the mean of its divisors is an integer number (35653252099).

Almost surely, 2^71306504197 is an apocalyptic number.

It is an amenable number.

71306504197 is a deficient number, since it is larger than the sum of its proper divisors (1).

71306504197 is an equidigital number, since it uses as much as digits as its factorization.

71306504197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 158760, while the sum is 43.

The spelling of 71306504197 in words is "seventy-one billion, three hundred six million, five hundred four thousand, one hundred ninety-seven".