71123647 has 12 divisors (see below), whose sum is σ = 82919496. Its totient is φ = 60827760.

The previous prime is 71123639. The next prime is 71123651. The reversal of 71123647 is 74632117.

It is not a de Polignac number, because 71123647 - 2³ = 71123639 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 (71123617) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25168 + ... + 27850.

It is an arithmetic number, because the mean of its divisors is an integer number (6909958).

Almost surely, 2^71123647 is an apocalyptic number.

71123647 is a deficient number, since it is larger than the sum of its proper divisors (11795849).

71123647 is a wasteful number, since it uses less digits than its factorization.

71123647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3238 (or 3231 counting only the distinct ones).

The product of its digits is 7056, while the sum is 31.

The square root of 71123647 is about 8433.4836811368. The cubic root of 71123647 is about 414.3220109810.

The spelling of 71123647 in words is "seventy-one million, one hundred twenty-three thousand, six hundred forty-seven".