71117065 has 4 divisors (see below), whose sum is σ = 85340484. Its totient is φ = 56893648.

The previous prime is 71117023. The next prime is 71117089. The reversal of 71117065 is 56071117.

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 54051904 + 17065161 = 7352^2 + 4131^2 .

It is a cyclic number.

It is not a de Polignac number, because 71117065 - 2¹⁵ = 71084297 is a prime.

It is a Duffinian 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 3 ways as a sum of consecutive naturals, for example, 7111702 + ... + 7111711.

It is an arithmetic number, because the mean of its divisors is an integer number (21335121).

Almost surely, 2^71117065 is an apocalyptic number.

It is an amenable number.

71117065 is a deficient number, since it is larger than the sum of its proper divisors (14223419).

71117065 is a wasteful number, since it uses less digits than its factorization.

71117065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14223418.

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

The square root of 71117065 is about 8433.0934419109. The cubic root of 71117065 is about 414.3092297110.

The spelling of 71117065 in words is "seventy-one million, one hundred seventeen thousand, sixty-five".