71745879 has 4 divisors (see below), whose sum is σ = 95661176. Its totient is φ = 47830584.

The previous prime is 71745853. The next prime is 71745893. The reversal of 71745879 is 97854717.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97854717 = 3 ⋅32618239.

It is not a de Polignac number, because 71745879 - 2¹² = 71741783 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 (71745979) 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, 11957644 + ... + 11957649.

It is an arithmetic number, because the mean of its divisors is an integer number (23915294).

Almost surely, 2^71745879 is an apocalyptic number.

71745879 is a deficient number, since it is larger than the sum of its proper divisors (23915297).

71745879 is a wasteful number, since it uses less digits than its factorization.

71745879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23915296.

The product of its digits is 493920, while the sum is 48.

The square root of 71745879 is about 8470.2939146171. The cubic root of 71745879 is about 415.5267497162.

The spelling of 71745879 in words is "seventy-one million, seven hundred forty-five thousand, eight hundred seventy-nine".