79719589 has 4 divisors (see below), whose sum is σ = 79753324. Its totient is φ = 79685856.

The previous prime is 79719583. The next prime is 79719593. The reversal of 79719589 is 98591797.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 98591797 = 89 ⋅1107773.

It can be written as a sum of positive squares in 2 ways, for example, as 48191364 + 31528225 = 6942^2 + 5615^2 .

It is a cyclic number.

It is not a de Polignac number, because 79719589 - 2⁷ = 79719461 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 (79719583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13032 + ... + 18145.

It is an arithmetic number, because the mean of its divisors is an integer number (19938331).

Almost surely, 2^79719589 is an apocalyptic number.

It is an amenable number.

79719589 is a deficient number, since it is larger than the sum of its proper divisors (33735).

79719589 is a wasteful number, since it uses less digits than its factorization.

79719589 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33734.

The product of its digits is 1428840, while the sum is 55.

The square root of 79719589 is about 8928.5826982786. The cubic root of 79719589 is about 430.3829093287.

It can be divided in two parts, 79719 and 589, that added together give a palindrome (80308).

The spelling of 79719589 in words is "seventy-nine million, seven hundred nineteen thousand, five hundred eighty-nine".