71706443 has 4 divisors (see below), whose sum is σ = 73232160. Its totient is φ = 70180728.

The previous prime is 71706389. The next prime is 71706457. The reversal of 71706443 is 34460717.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34460717 = 17 ⋅2027101.

It is a cyclic number.

It is not a de Polignac number, because 71706443 - 2¹² = 71702347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71706463) 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, 762788 + ... + 762881.

It is an arithmetic number, because the mean of its divisors is an integer number (18308040).

Almost surely, 2^71706443 is an apocalyptic number.

71706443 is a deficient number, since it is larger than the sum of its proper divisors (1525717).

71706443 is a wasteful number, since it uses less digits than its factorization.

71706443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1525716.

The product of its (nonzero) digits is 14112, while the sum is 32.

The square root of 71706443 is about 8467.9656943093. The cubic root of 71706443 is about 415.4506026425.

The spelling of 71706443 in words is "seventy-one million, seven hundred six thousand, four hundred forty-three".