8372799009 has 21 divisors (see below), whose sum is σ = 12557161123. Its totient is φ = 5580218952.

The previous prime is 8372798971. The next prime is 8372799031. The reversal of 8372799009 is 9009972738.

The square root of 8372799009 is 91503.

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

It can be written as a sum of positive squares in only one way, i.e., 8127563409 + 245235600 = 90153^2 + 15660^2 .

It is not a de Polignac number, because 8372799009 - 2¹¹ = 8372796961 is a prime.

It is a super-2 number, since 2×8372799009² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8372799059) by changing a digit.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 2468887 + ... + 2472275.

Almost surely, 2^8372799009 is an apocalyptic number.

8372799009 is the 91503-rd square number.

8372799009 is the 45752-nd centered octagonal number.

It is an amenable number.

8372799009 is a deficient number, since it is larger than the sum of its proper divisors (4184362114).

8372799009 is an frugal number, since it uses more digits than its factorization.

8372799009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6796 (or 3392 counting only the distinct ones).

The product of its (nonzero) digits is 1714608, while the sum is 54.

The cubic root of 8372799009 is about 2030.5961355156.

The spelling of 8372799009 in words is "eight billion, three hundred seventy-two million, seven hundred ninety-nine thousand, nine".