8979647121 has 15 divisors (see below), whose sum is σ = 13415314891. Its totient is φ = 5985862848.

The previous prime is 8979647111. The next prime is 8979647123. The reversal of 8979647121 is 1217469798.

The square root of 8979647121 is 94761.

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

8979647121 is a `hidden beast` number, since 89 + 7 + 96 + 471 + 2 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 7265687121 + 1713960000 = 85239^2 + 41400^2 .

It is not a de Polignac number, because 8979647121 - 2¹⁹ = 8979122833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8979647123) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 847585 + ... + 858113.

Almost surely, 2^8979647121 is an apocalyptic number.

8979647121 is a gapful number since it is divisible by the number (81) formed by its first and last digit.

8979647121 is the 94761-st square number.

8979647121 is the 47381-st centered octagonal number.

It is an amenable number.

8979647121 is a deficient number, since it is larger than the sum of its proper divisors (4435667770).

8979647121 is an frugal number, since it uses more digits than its factorization.

8979647121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21070 (or 10532 counting only the distinct ones).

The product of its digits is 1524096, while the sum is 54.

The cubic root of 8979647121 is about 2078.5146509186.

It can be divided in two parts, 8979 and 647121, that added together give a square (656100 = 810²).

The spelling of 8979647121 in words is "eight billion, nine hundred seventy-nine million, six hundred forty-seven thousand, one hundred twenty-one".