71173289 has 12 divisors (see below), whose sum is σ = 78451380. Its totient is φ = 64521600.

The previous prime is 71173261. The next prime is 71173327. The reversal of 71173289 is 98237117.

It can be written as a sum of positive squares in 2 ways, for example, as 12390400 + 58782889 = 3520^2 + 7667^2 .

It is not a de Polignac number, because 71173289 - 2²⁰ = 70124713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71173889) by changing a digit.

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, 62477 + ... + 63605.

It is an arithmetic number, because the mean of its divisors is an integer number (6537615).

Almost surely, 2^71173289 is an apocalyptic number.

It is an amenable number.

71173289 is a deficient number, since it is larger than the sum of its proper divisors (7278091).

71173289 is a wasteful number, since it uses less digits than its factorization.

71173289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1672 (or 1661 counting only the distinct ones).

The product of its digits is 21168, while the sum is 38.

The square root of 71173289 is about 8436.4263168714. The cubic root of 71173289 is about 414.4183830072.

The spelling of 71173289 in words is "seventy-one million, one hundred seventy-three thousand, two hundred eighty-nine".