71705085 has 16 divisors (see below), whose sum is σ = 114838080. Its totient is φ = 38206080.

The previous prime is 71705063. The next prime is 71705113. The reversal of 71705085 is 58050717.

It is not a de Polignac number, because 71705085 - 2⁶ = 71705021 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 22650 + ... + 25620.

It is an arithmetic number, because the mean of its divisors is an integer number (7177380).

Almost surely, 2^71705085 is an apocalyptic number.

It is an amenable number.

71705085 is a deficient number, since it is larger than the sum of its proper divisors (43132995).

71705085 is a wasteful number, since it uses less digits than its factorization.

71705085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4588.

The product of its (nonzero) digits is 9800, while the sum is 33.

The square root of 71705085 is about 8467.8855093819. The cubic root of 71705085 is about 415.4479799796.

The spelling of 71705085 in words is "seventy-one million, seven hundred five thousand, eighty-five".