71231679 has 24 divisors (see below), whose sum is σ = 104936832. Its totient is φ = 46553040.

The previous prime is 71231669. The next prime is 71231681. The reversal of 71231679 is 97613217.

It is a happy number.

It is not a de Polignac number, because 71231679 - 2⁴ = 71231663 is a prime.

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71231639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 124464 + ... + 125034.

It is an arithmetic number, because the mean of its divisors is an integer number (4372368).

Almost surely, 2^71231679 is an apocalyptic number.

71231679 is a deficient number, since it is larger than the sum of its proper divisors (33705153).

71231679 is a wasteful number, since it uses less digits than its factorization.

71231679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 827 (or 824 counting only the distinct ones).

The product of its digits is 15876, while the sum is 36.

The square root of 71231679 is about 8439.8861959152. The cubic root of 71231679 is about 414.5316805447.

The spelling of 71231679 in words is "seventy-one million, two hundred thirty-one thousand, six hundred seventy-nine".