71079791 has 4 divisors (see below), whose sum is σ = 71099712. Its totient is φ = 71059872.

The previous prime is 71079787. The next prime is 71079797. The reversal of 71079791 is 19797017.

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 71079791 - 2² = 71079787 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 (71079797) 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, 2975 + ... + 12288.

It is an arithmetic number, because the mean of its divisors is an integer number (17774928).

Almost surely, 2^71079791 is an apocalyptic number.

71079791 is a deficient number, since it is larger than the sum of its proper divisors (19921).

71079791 is a wasteful number, since it uses less digits than its factorization.

71079791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19920.

The product of its (nonzero) digits is 27783, while the sum is 41.

The square root of 71079791 is about 8430.8831684468. The cubic root of 71079791 is about 414.2368342364.

The spelling of 71079791 in words is "seventy-one million, seventy-nine thousand, seven hundred ninety-one".