71906085 has 12 divisors (see below), whose sum is σ = 124637292. Its totient is φ = 38349888.

The previous prime is 71906077. The next prime is 71906111. The reversal of 71906085 is 58060917.

It can be written as a sum of positive squares in 2 ways, for example, as 42810849 + 29095236 = 6543^2 + 5394^2 .

It is not a de Polignac number, because 71906085 - 2³ = 71906077 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 (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 798912 + ... + 799001.

It is an arithmetic number, because the mean of its divisors is an integer number (10386441).

Almost surely, 2^71906085 is an apocalyptic number.

It is an amenable number.

71906085 is a deficient number, since it is larger than the sum of its proper divisors (52731207).

71906085 is a wasteful number, since it uses less digits than its factorization.

71906085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1597924 (or 1597921 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

The square root of 71906085 is about 8479.7455740134. The cubic root of 71906085 is about 415.8358052855.

The spelling of 71906085 in words is "seventy-one million, nine hundred six thousand, eighty-five".