71718943 has 4 divisors (see below), whose sum is σ = 74192040. Its totient is φ = 69245848.

The previous prime is 71718931. The next prime is 71718947. The reversal of 71718943 is 34981717.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 71718943 - 2⁹ = 71718431 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71718896 and 71718905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71718947) 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, 1236505 + ... + 1236562.

It is an arithmetic number, because the mean of its divisors is an integer number (18548010).

Almost surely, 2^71718943 is an apocalyptic number.

71718943 is a deficient number, since it is larger than the sum of its proper divisors (2473097).

71718943 is a wasteful number, since it uses less digits than its factorization.

71718943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2473096.

The product of its digits is 42336, while the sum is 40.

The square root of 71718943 is about 8468.7037378810. The cubic root of 71718943 is about 415.4747419461.

The spelling of 71718943 in words is "seventy-one million, seven hundred eighteen thousand, nine hundred forty-three".