71879539 has 2 divisors, whose sum is σ = 71879540. Its totient is φ = 71879538.

The previous prime is 71879491. The next prime is 71879557. The reversal of 71879539 is 93597817.

It is a strong prime.

It is an emirp because it is prime and its reverse (93597817) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71879539 - 2²¹ = 69782387 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 71879492 and 71879501.

It is not a weakly prime, because it can be changed into another prime (71879939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35939769 + 35939770.

It is an arithmetic number, because the mean of its divisors is an integer number (35939770).

Almost surely, 2^71879539 is an apocalyptic number.

71879539 is a deficient number, since it is larger than the sum of its proper divisors (1).

71879539 is an equidigital number, since it uses as much as digits as its factorization.

71879539 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 476280, while the sum is 49.

The square root of 71879539 is about 8478.1801702960. The cubic root of 71879539 is about 415.7846267889.

The spelling of 71879539 in words is "seventy-one million, eight hundred seventy-nine thousand, five hundred thirty-nine".