71988579 has 48 divisors (see below), whose sum is σ = 117717600. Its totient is φ = 42094080.

The previous prime is 71988577. The next prime is 71988583. The reversal of 71988579 is 97588917.

It is not a de Polignac number, because 71988579 - 2¹ = 71988577 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71988577) 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 in 47 ways as a sum of consecutive naturals, for example, 206097 + ... + 206445.

It is an arithmetic number, because the mean of its divisors is an integer number (2452450).

Almost surely, 2^71988579 is an apocalyptic number.

71988579 is a deficient number, since it is larger than the sum of its proper divisors (45729021).

71988579 is a wasteful number, since it uses less digits than its factorization.

71988579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452 (or 449 counting only the distinct ones).

The product of its digits is 1270080, while the sum is 54.

The square root of 71988579 is about 8484.6083586692. The cubic root of 71988579 is about 415.9947665608.

It can be divided in two parts, 719 and 88579, that added together give a palindrome (89298).

The spelling of 71988579 in words is "seventy-one million, nine hundred eighty-eight thousand, five hundred seventy-nine".