71312747 has 16 divisors (see below), whose sum is σ = 79488000. Its totient is φ = 63435840.

The previous prime is 71312743. The next prime is 71312753. The reversal of 71312747 is 74721317.

It is a cyclic number.

It is not a de Polignac number, because 71312747 - 2² = 71312743 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71312743) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118754 + ... + 119352.

It is an arithmetic number, because the mean of its divisors is an integer number (4968000).

Almost surely, 2^71312747 is an apocalyptic number.

71312747 is a deficient number, since it is larger than the sum of its proper divisors (8175253).

71312747 is a wasteful number, since it uses less digits than its factorization.

71312747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 826.

The product of its digits is 8232, while the sum is 32.

The square root of 71312747 is about 8444.6875016190. The cubic root of 71312747 is about 414.6888789252.

The spelling of 71312747 in words is "seventy-one million, three hundred twelve thousand, seven hundred forty-seven".