71208902197 has 2 divisors, whose sum is σ = 71208902198. Its totient is φ = 71208902196.

The previous prime is 71208902189. The next prime is 71208902203. The reversal of 71208902197 is 79120980217.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39328442596 + 31880459601 = 198314^2 + 178551^2 .

It is a cyclic number.

It is not a de Polignac number, because 71208902197 - 2³ = 71208902189 is a prime.

It is a super-2 number, since 2×71208902197² (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 (71208902117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35604451098 + 35604451099.

It is an arithmetic number, because the mean of its divisors is an integer number (35604451099).

Almost surely, 2^71208902197 is an apocalyptic number.

It is an amenable number.

71208902197 is a deficient number, since it is larger than the sum of its proper divisors (1).

71208902197 is an equidigital number, since it uses as much as digits as its factorization.

71208902197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 127008, while the sum is 46.

The spelling of 71208902197 in words is "seventy-one billion, two hundred eight million, nine hundred two thousand, one hundred ninety-seven".