71317793 has 4 divisors (see below), whose sum is σ = 71337108. Its totient is φ = 71298480.

The previous prime is 71317787. The next prime is 71317823. The reversal of 71317793 is 39771317.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39771317 = 193 ⋅206069.

It can be written as a sum of positive squares in 2 ways, for example, as 18421264 + 52896529 = 4292^2 + 7273^2 .

It is a cyclic number.

It is not a de Polignac number, because 71317793 - 2¹⁰ = 71316769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71317783) 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, 2198 + ... + 12143.

It is an arithmetic number, because the mean of its divisors is an integer number (17834277).

Almost surely, 2^71317793 is an apocalyptic number.

It is an amenable number.

71317793 is a deficient number, since it is larger than the sum of its proper divisors (19315).

71317793 is a wasteful number, since it uses less digits than its factorization.

71317793 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19314.

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

The square root of 71317793 is about 8444.9862640504. The cubic root of 71317793 is about 414.6986596485.

The spelling of 71317793 in words is "seventy-one million, three hundred seventeen thousand, seven hundred ninety-three".