71085791 has 8 divisors (see below), whose sum is σ = 81323040. Its totient is φ = 60869088.

The previous prime is 71085691. The next prime is 71085793. The reversal of 71085791 is 19758017.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 71085791 - 2¹⁴ = 71069407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71085793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3185 + ... + 12341.

It is an arithmetic number, because the mean of its divisors is an integer number (10165380).

Almost surely, 2^71085791 is an apocalyptic number.

71085791 is a deficient number, since it is larger than the sum of its proper divisors (10237249).

71085791 is a wasteful number, since it uses less digits than its factorization.

71085791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10273.

The product of its (nonzero) digits is 17640, while the sum is 38.

The square root of 71085791 is about 8431.2389955451. The cubic root of 71085791 is about 414.2484894530.

The spelling of 71085791 in words is "seventy-one million, eighty-five thousand, seven hundred ninety-one".