71710945 has 4 divisors (see below), whose sum is σ = 86053140. Its totient is φ = 57368752.

The previous prime is 71710867. The next prime is 71710963. The reversal of 71710945 is 54901717.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 29408929 + 42302016 = 5423^2 + 6504^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71710945 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71710945.

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, 7171090 + ... + 7171099.

It is an arithmetic number, because the mean of its divisors is an integer number (21513285).

Almost surely, 2^71710945 is an apocalyptic number.

It is an amenable number.

71710945 is a deficient number, since it is larger than the sum of its proper divisors (14342195).

71710945 is a wasteful number, since it uses less digits than its factorization.

71710945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14342194.

The product of its (nonzero) digits is 8820, while the sum is 34.

The square root of 71710945 is about 8468.2315154937. The cubic root of 71710945 is about 415.4592969773.

The spelling of 71710945 in words is "seventy-one million, seven hundred ten thousand, nine hundred forty-five".