78889759 has 4 divisors (see below), whose sum is σ = 84958216. Its totient is φ = 72821304.

The previous prime is 78889703. The next prime is 78889763. The reversal of 78889759 is 95798887.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95798887 = 23 ⋅4165169.

It is a cyclic number.

It is not a de Polignac number, because 78889759 - 2⁹ = 78889247 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78889697 and 78889706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78880759) 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, 3034209 + ... + 3034234.

It is an arithmetic number, because the mean of its divisors is an integer number (21239554).

Almost surely, 2^78889759 is an apocalyptic number.

78889759 is a deficient number, since it is larger than the sum of its proper divisors (6068457).

78889759 is a wasteful number, since it uses less digits than its factorization.

78889759 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6068456.

The product of its digits is 10160640, while the sum is 61.

The square root of 78889759 is about 8881.9907115466. The cubic root of 78889759 is about 428.8843605341.

The spelling of 78889759 in words is "seventy-eight million, eight hundred eighty-nine thousand, seven hundred fifty-nine".