8969479918281 has 27 divisors (see below), whose sum is σ = 13013466609351. Its totient is φ = 5953208232384.

The previous prime is 8969479918241. The next prime is 8969479918291. The reversal of 8969479918281 is 1828199749698.

It is a happy number.

The square root of 8969479918281 is 2994909.

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

8969479918281 is a `hidden beast` number, since 8 + 9 + 69 + 479 + 9 + 1 + 8 + 2 + 81 = 666.

It can be written as a sum of positive squares in only one way, i.e., 8287230350025 + 682249568256 = 2878755^2 + 825984^2 .

It is not a de Polignac number, because 8969479918281 - 2¹⁹ = 8969479393993 is a prime.

It is a super-2 number, since 2×8969479918281² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 8969479918281.

It is not an unprimeable number, because it can be changed into a prime (8969479918241) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 2147347665 + ... + 2147351841.

Almost surely, 2^{8969479918281} is an apocalyptic number.

8969479918281 is the 2994909-th square number.

8969479918281 is the 1497455-th centered octagonal number.

It is an amenable number.

8969479918281 is a deficient number, since it is larger than the sum of its proper divisors (4043986691070).

8969479918281 is an frugal number, since it uses more digits than its factorization.

8969479918281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8838 (or 4419 counting only the distinct ones).

The product of its digits is 1128701952, while the sum is 81.

Multiplying 8969479918281 by its sum of digits (81), we get a square (726527873380761 = 26954181²).

The spelling of 8969479918281 in words is "eight trillion, nine hundred sixty-nine billion, four hundred seventy-nine million, nine hundred eighteen thousand, two hundred eighty-one".