71112643 has 4 divisors (see below), whose sum is σ = 81271600. Its totient is φ = 60953688.

The previous prime is 71112637. The next prime is 71112647. The reversal of 71112643 is 34621117.

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 71112643 - 2⁹ = 71112131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71112647) 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, 5079468 + ... + 5079481.

It is an arithmetic number, because the mean of its divisors is an integer number (20317900).

Almost surely, 2^71112643 is an apocalyptic number.

71112643 is a deficient number, since it is larger than the sum of its proper divisors (10158957).

71112643 is a wasteful number, since it uses less digits than its factorization.

71112643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10158956.

The product of its digits is 1008, while the sum is 25.

The square root of 71112643 is about 8432.8312564642. The cubic root of 71112643 is about 414.3006423985.

The spelling of 71112643 in words is "seventy-one million, one hundred twelve thousand, six hundred forty-three".