8978223129 has 16 divisors (see below), whose sum is σ = 12532968000. Its totient is φ = 5709454016.

The previous prime is 8978223103. The next prime is 8978223139. The reversal of 8978223129 is 9213228798.

It is a cyclic number.

It is not a de Polignac number, because 8978223129 - 2¹¹ = 8978221081 is a prime.

It is a super-2 number, since 2×8978223129² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (8978223139) 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 15 ways as a sum of consecutive naturals, for example, 614454 + ... + 628895.

It is an arithmetic number, because the mean of its divisors is an integer number (783310500).

Almost surely, 2^8978223129 is an apocalyptic number.

It is an amenable number.

8978223129 is a deficient number, since it is larger than the sum of its proper divisors (3554744871).

8978223129 is a wasteful number, since it uses less digits than its factorization.

8978223129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1243464.

The product of its digits is 870912, while the sum is 51.

The square root of 8978223129 is about 94753.4861047339. The cubic root of 8978223129 is about 2078.4047748599.

The spelling of 8978223129 in words is "eight billion, nine hundred seventy-eight million, two hundred twenty-three thousand, one hundred twenty-nine".