71173973 has 4 divisors (see below), whose sum is σ = 76648908. Its totient is φ = 65699040.

The previous prime is 71173967. The next prime is 71174011. The reversal of 71173973 is 37937117.

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 2896804 + 68277169 = 1702^2 + 8263^2 .

It is a cyclic number.

It is not a de Polignac number, because 71173973 - 2⁴ = 71173957 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 (71173913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2737448 + ... + 2737473.

It is an arithmetic number, because the mean of its divisors is an integer number (19162227).

Almost surely, 2^71173973 is an apocalyptic number.

It is an amenable number.

71173973 is a deficient number, since it is larger than the sum of its proper divisors (5474935).

71173973 is a wasteful number, since it uses less digits than its factorization.

71173973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5474934.

The product of its digits is 27783, while the sum is 38.

The square root of 71173973 is about 8436.4668552659. The cubic root of 71173973 is about 414.4197105711.

The spelling of 71173973 in words is "seventy-one million, one hundred seventy-three thousand, nine hundred seventy-three".