71711643 has 8 divisors (see below), whose sum is σ = 100648000. Its totient is φ = 45291528.

The previous prime is 71711621. The next prime is 71711663. The reversal of 71711643 is 34611717.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 71711643 - 2⁹ = 71711131 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 71711643.

It is not an unprimeable number, because it can be changed into a prime (71711663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 628993 + ... + 629106.

It is an arithmetic number, because the mean of its divisors is an integer number (12581000).

Almost surely, 2^71711643 is an apocalyptic number.

71711643 is a deficient number, since it is larger than the sum of its proper divisors (28936357).

71711643 is a wasteful number, since it uses less digits than its factorization.

71711643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1258121.

The product of its digits is 3528, while the sum is 30.

The square root of 71711643 is about 8468.2727282487. The cubic root of 71711643 is about 415.4606449335.

The spelling of 71711643 in words is "seventy-one million, seven hundred eleven thousand, six hundred forty-three".