71716817 has 4 divisors (see below), whose sum is σ = 71821296. Its totient is φ = 71612340.

The previous prime is 71716807. The next prime is 71716847. The reversal of 71716817 is 71861717.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71716817 is a prime.

It is a super-2 number, since 2×71716817² = 10286603681222978, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71716807) 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, 51203 + ... + 52584.

It is an arithmetic number, because the mean of its divisors is an integer number (17955324).

Almost surely, 2^71716817 is an apocalyptic number.

It is an amenable number.

71716817 is a deficient number, since it is larger than the sum of its proper divisors (104479).

71716817 is a wasteful number, since it uses less digits than its factorization.

71716817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104478.

The product of its digits is 16464, while the sum is 38.

The square root of 71716817 is about 8468.5782159699. The cubic root of 71716817 is about 415.4706365313.

The spelling of 71716817 in words is "seventy-one million, seven hundred sixteen thousand, eight hundred seventeen".