8722979109 has 18 divisors (see below), whose sum is σ = 13643636370. Its totient is φ = 5367986208.

The previous prime is 8722979101. The next prime is 8722979129. The reversal of 8722979109 is 9019792278.

It can be written as a sum of positive squares in 3 ways, for example, as 4088484 + 8718890625 = 2022^2 + 93375^2 .

It is not a de Polignac number, because 8722979109 - 2³ = 8722979101 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8722979101) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2865994 + ... + 2869035.

Almost surely, 2^8722979109 is an apocalyptic number.

It is an amenable number.

8722979109 is a deficient number, since it is larger than the sum of its proper divisors (4920657261).

8722979109 is a wasteful number, since it uses less digits than its factorization.

8722979109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5735061 (or 5735045 counting only the distinct ones).

The product of its (nonzero) digits is 1143072, while the sum is 54.

The square root of 8722979109 is about 93396.8902533698. The cubic root of 8722979109 is about 2058.5193045881.

The spelling of 8722979109 in words is "eight billion, seven hundred twenty-two million, nine hundred seventy-nine thousand, one hundred nine".