71047047 has 8 divisors (see below), whose sum is σ = 94898160. Its totient is φ = 47280320.

The previous prime is 71047043. The next prime is 71047117. The reversal of 71047047 is 74074017.

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

It is a cyclic number.

It is not a de Polignac number, because 71047047 - 2² = 71047043 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71047043) 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 7 ways as a sum of consecutive naturals, for example, 19104 + ... + 22517.

It is an arithmetic number, because the mean of its divisors is an integer number (11862270).

Almost surely, 2^71047047 is an apocalyptic number.

71047047 is a deficient number, since it is larger than the sum of its proper divisors (23851113).

71047047 is a wasteful number, since it uses less digits than its factorization.

71047047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42193.

The product of its (nonzero) digits is 5488, while the sum is 30.

The square root of 71047047 is about 8428.9410366902. The cubic root of 71047047 is about 414.1732162750.

The spelling of 71047047 in words is "seventy-one million, forty-seven thousand, forty-seven".