71957679 has 4 divisors (see below), whose sum is σ = 95943576. Its totient is φ = 47971784.

The previous prime is 71957663. The next prime is 71957701. The reversal of 71957679 is 97675917.

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

It is a cyclic number.

It is not a de Polignac number, because 71957679 - 2⁴ = 71957663 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71957629) 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, 11992944 + ... + 11992949.

It is an arithmetic number, because the mean of its divisors is an integer number (23985894).

Almost surely, 2^71957679 is an apocalyptic number.

71957679 is a deficient number, since it is larger than the sum of its proper divisors (23985897).

71957679 is a wasteful number, since it uses less digits than its factorization.

71957679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23985896.

The product of its digits is 833490, while the sum is 51.

The square root of 71957679 is about 8482.7872188332. The cubic root of 71957679 is about 415.9352382390.

The spelling of 71957679 in words is "seventy-one million, nine hundred fifty-seven thousand, six hundred seventy-nine".