71213173091839 has 2 divisors, whose sum is σ = 71213173091840. Its totient is φ = 71213173091838.

The previous prime is 71213173091729. The next prime is 71213173091923. The reversal of 71213173091839 is 93819037131217.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71213173091839 - 2¹¹ = 71213173089791 is a prime.

It is a super-3 number, since 3×71213173091839³ (a number of 43 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 71213173091839.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71213173391839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35606586545919 + 35606586545920.

It is an arithmetic number, because the mean of its divisors is an integer number (35606586545920).

Almost surely, 2^{71213173091839} is an apocalyptic number.

71213173091839 is a deficient number, since it is larger than the sum of its proper divisors (1).

71213173091839 is an equidigital number, since it uses as much as digits as its factorization.

71213173091839 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1714608, while the sum is 55.

The spelling of 71213173091839 in words is "seventy-one trillion, two hundred thirteen billion, one hundred seventy-three million, ninety-one thousand, eight hundred thirty-nine".