71065117 has 4 divisors (see below), whose sum is σ = 75245436. Its totient is φ = 66884800.

The previous prime is 71065069. The next prime is 71065133. The reversal of 71065117 is 71156017.

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 61293241 + 9771876 = 7829^2 + 3126^2 .

It is a de Polignac number, because none of the positive numbers 2^k-71065117 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 (71065157) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2090134 + ... + 2090167.

It is an arithmetic number, because the mean of its divisors is an integer number (18811359).

Almost surely, 2^71065117 is an apocalyptic number.

It is an amenable number.

71065117 is a deficient number, since it is larger than the sum of its proper divisors (4180319).

71065117 is a wasteful number, since it uses less digits than its factorization.

71065117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4180318.

The product of its (nonzero) digits is 1470, while the sum is 28.

The square root of 71065117 is about 8430.0128706901. The cubic root of 71065117 is about 414.2083266979.

The spelling of 71065117 in words is "seventy-one million, sixty-five thousand, one hundred seventeen".