71386717 has 4 divisors (see below), whose sum is σ = 71471260. Its totient is φ = 71302176.

The previous prime is 71386709. The next prime is 71386739. The reversal of 71386717 is 71768317.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71768317 = 31 ⋅2315107.

It can be written as a sum of positive squares in 2 ways, for example, as 29474041 + 41912676 = 5429^2 + 6474^2 .

It is a cyclic number.

It is not a de Polignac number, because 71386717 - 2³ = 71386709 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 71386717.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71386787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40992 + ... + 42697.

It is an arithmetic number, because the mean of its divisors is an integer number (17867815).

Almost surely, 2^71386717 is an apocalyptic number.

It is an amenable number.

71386717 is a deficient number, since it is larger than the sum of its proper divisors (84543).

71386717 is an equidigital number, since it uses as much as digits as its factorization.

71386717 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84542.

The product of its digits is 49392, while the sum is 40.

The square root of 71386717 is about 8449.0660430606. The cubic root of 71386717 is about 414.8322097131.

The spelling of 71386717 in words is "seventy-one million, three hundred eighty-six thousand, seven hundred seventeen".