8722779 has 16 divisors (see below), whose sum is σ = 12601344. Its totient is φ = 5335200.

The previous prime is 8722757. The next prime is 8722789. The reversal of 8722779 is 9772278.

It is not a de Polignac number, because 8722779 - 2²³ = 334171 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8722779.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8722739) 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 15 ways as a sum of consecutive naturals, for example, 6864 + ... + 8034.

It is an arithmetic number, because the mean of its divisors is an integer number (787584).

Almost surely, 2^8722779 is an apocalyptic number.

8722779 is a deficient number, since it is larger than the sum of its proper divisors (3878565).

8722779 is a wasteful number, since it uses less digits than its factorization.

8722779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1378.

The product of its digits is 98784, while the sum is 42.

The square root of 8722779 is about 2953.4351186373. The cubic root of 8722779 is about 205.8503563353.

The spelling of 8722779 in words is "eight million, seven hundred twenty-two thousand, seven hundred seventy-nine".