71847213 has 4 divisors (see below), whose sum is σ = 95796288. Its totient is φ = 47898140.

The previous prime is 71847197. The next prime is 71847233. The reversal of 71847213 is 31274817.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 71847213 - 2⁴ = 71847197 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71847233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11974533 + ... + 11974538.

It is an arithmetic number, because the mean of its divisors is an integer number (23949072).

Almost surely, 2^71847213 is an apocalyptic number.

It is an amenable number.

71847213 is a deficient number, since it is larger than the sum of its proper divisors (23949075).

71847213 is a wasteful number, since it uses less digits than its factorization.

71847213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23949074.

The product of its digits is 9408, while the sum is 33.

The square root of 71847213 is about 8476.2735326321. The cubic root of 71847213 is about 415.7222879119.

The spelling of 71847213 in words is "seventy-one million, eight hundred forty-seven thousand, two hundred thirteen".