8609900779 has 4 divisors (see below), whose sum is σ = 8635449784. Its totient is φ = 8584351776.

The previous prime is 8609900731. The next prime is 8609900791. The reversal of 8609900779 is 9770099068.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 8609900779 - 2¹³ = 8609892587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8609903779) 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 3 ways as a sum of consecutive naturals, for example, 12773997 + ... + 12774670.

It is an arithmetic number, because the mean of its divisors is an integer number (2158862446).

Almost surely, 2^8609900779 is an apocalyptic number.

8609900779 is a deficient number, since it is larger than the sum of its proper divisors (25549005).

8609900779 is a wasteful number, since it uses less digits than its factorization.

8609900779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25549004.

The product of its (nonzero) digits is 1714608, while the sum is 55.

The square root of 8609900779 is about 92789.5510227310. The cubic root of 8609900779 is about 2049.5855421498.

The spelling of 8609900779 in words is "eight billion, six hundred nine million, nine hundred thousand, seven hundred seventy-nine".