8779127809 has 9 divisors (see below), whose sum is σ = 8992168353. Its totient is φ = 8571026772.

The previous prime is 8779127767. The next prime is 8779127831. The reversal of 8779127809 is 9087219778.

The square root of 8779127809 is 93697.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 8779127809 - 2²⁷ = 8644910081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8779127909) 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 8 ways as a sum of consecutive naturals, for example, 4027882 + ... + 4030060.

It is an arithmetic number, because the mean of its divisors is an integer number (999129817).

Almost surely, 2^8779127809 is an apocalyptic number.

8779127809 is the 93697-th square number.

8779127809 is the 46849-th centered octagonal number.

It is an amenable number.

8779127809 is a deficient number, since it is larger than the sum of its proper divisors (213040544).

8779127809 is an frugal number, since it uses more digits than its factorization.

8779127809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4444 (or 2222 counting only the distinct ones).

The product of its (nonzero) digits is 3556224, while the sum is 58.

The cubic root of 8779127809 is about 2062.9266699484.

It can be divided in two parts, 87791 and 27809, that added together give a square (115600 = 340²).

The spelling of 8779127809 in words is "eight billion, seven hundred seventy-nine million, one hundred twenty-seven thousand, eight hundred nine".