71879771 has 2 divisors, whose sum is σ = 71879772. Its totient is φ = 71879770.

The previous prime is 71879749. The next prime is 71879803. The reversal of 71879771 is 17797817.

It is a weak prime.

It is an emirp because it is prime and its reverse (17797817) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71879771 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (71879971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35939885 + 35939886.

It is an arithmetic number, because the mean of its divisors is an integer number (35939886).

Almost surely, 2^71879771 is an apocalyptic number.

71879771 is a deficient number, since it is larger than the sum of its proper divisors (1).

71879771 is an equidigital number, since it uses as much as digits as its factorization.

71879771 is an evil number, because the sum of its binary digits is even.

The product of its digits is 172872, while the sum is 47.

The square root of 71879771 is about 8478.1938524665. The cubic root of 71879771 is about 415.7850741203.

The spelling of 71879771 in words is "seventy-one million, eight hundred seventy-nine thousand, seven hundred seventy-one".