71011047 has 4 divisors (see below), whose sum is σ = 94681400. Its totient is φ = 47340696.

The previous prime is 71011033. The next prime is 71011063. The reversal of 71011047 is 74011017.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 71011047 - 2⁶ = 71010983 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71011007) 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, 11835172 + ... + 11835177.

It is an arithmetic number, because the mean of its divisors is an integer number (23670350).

Almost surely, 2^71011047 is an apocalyptic number.

71011047 is a deficient number, since it is larger than the sum of its proper divisors (23670353).

71011047 is a wasteful number, since it uses less digits than its factorization.

71011047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23670352.

The product of its (nonzero) digits is 196, while the sum is 21.

The square root of 71011047 is about 8426.8052665289. The cubic root of 71011047 is about 414.1032497035.

The spelling of 71011047 in words is "seventy-one million, eleven thousand, forty-seven".