8869821261 has 8 divisors (see below), whose sum is σ = 13515918144. Its totient is φ = 5068469280.

The previous prime is 8869821251. The next prime is 8869821271. The reversal of 8869821261 is 1621289688.

8869821261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (8869821251) and next prime (8869821271).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 8869821261 - 2⁷ = 8869821133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8869821241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 211186200 + ... + 211186241.

It is an arithmetic number, because the mean of its divisors is an integer number (1689489768).

Almost surely, 2^8869821261 is an apocalyptic number.

It is an amenable number.

8869821261 is a deficient number, since it is larger than the sum of its proper divisors (4646096883).

8869821261 is a wasteful number, since it uses less digits than its factorization.

8869821261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 422372451.

The product of its digits is 663552, while the sum is 51.

The square root of 8869821261 is about 94179.7285035373. The cubic root of 8869821261 is about 2070.0060881055.

The spelling of 8869821261 in words is "eight billion, eight hundred sixty-nine million, eight hundred twenty-one thousand, two hundred sixty-one".