71213173087087 has 2 divisors, whose sum is σ = 71213173087088. Its totient is φ = 71213173087086.

The previous prime is 71213173087039. The next prime is 71213173087103. The reversal of 71213173087087 is 78078037131217.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71213173087087 - 2¹¹ = 71213173085039 is a prime.

It is a super-2 number, since 2×71213173087087² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71213173087027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35606586543543 + 35606586543544.

It is an arithmetic number, because the mean of its divisors is an integer number (35606586543544).

Almost surely, 2^{71213173087087} is an apocalyptic number.

71213173087087 is a deficient number, since it is larger than the sum of its proper divisors (1).

71213173087087 is an equidigital number, since it uses as much as digits as its factorization.

71213173087087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2765952, while the sum is 55.

The spelling of 71213173087087 in words is "seventy-one trillion, two hundred thirteen billion, one hundred seventy-three million, eighty-seven thousand, eighty-seven".