71086293 has 6 divisors (see below), whose sum is σ = 102680214. Its totient is φ = 47390856.

The previous prime is 71086247. The next prime is 71086297. The reversal of 71086293 is 39268017.

It can be written as a sum of positive squares in only one way, i.e., 69255684 + 1830609 = 8322^2 + 1353^2 .

It is not a de Polignac number, because 71086293 - 2⁶ = 71086229 is a prime.

It is a super-2 number, since 2×71086293² = 10106522104963698, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71086297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3949230 + ... + 3949247.

It is an arithmetic number, because the mean of its divisors is an integer number (17113369).

Almost surely, 2^71086293 is an apocalyptic number.

It is an amenable number.

71086293 is a deficient number, since it is larger than the sum of its proper divisors (31593921).

71086293 is a wasteful number, since it uses less digits than its factorization.

71086293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7898483 (or 7898480 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 71086293 is about 8431.2687657315. The cubic root of 71086293 is about 414.2494645764.

The spelling of 71086293 in words is "seventy-one million, eighty-six thousand, two hundred ninety-three".