71386085 has 4 divisors (see below), whose sum is σ = 85663308. Its totient is φ = 57108864.

The previous prime is 71386079. The next prime is 71386121. The reversal of 71386085 is 58068317.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58068317 = 89 ⋅652453.

It can be written as a sum of positive squares in 2 ways, for example, as 25877569 + 45508516 = 5087^2 + 6746^2 .

It is a cyclic number.

It is not a de Polignac number, because 71386085 - 2²² = 67191781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 7138604 + ... + 7138613.

It is an arithmetic number, because the mean of its divisors is an integer number (21415827).

Almost surely, 2^71386085 is an apocalyptic number.

It is an amenable number.

71386085 is a deficient number, since it is larger than the sum of its proper divisors (14277223).

71386085 is a wasteful number, since it uses less digits than its factorization.

71386085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14277222.

The product of its (nonzero) digits is 40320, while the sum is 38.

The square root of 71386085 is about 8449.0286423943. The cubic root of 71386085 is about 414.8309855137.

The spelling of 71386085 in words is "seventy-one million, three hundred eighty-six thousand, eighty-five".