8782221869 has 4 divisors (see below), whose sum is σ = 8784409980. Its totient is φ = 8780033760.

The previous prime is 8782221841. The next prime is 8782221881. The reversal of 8782221869 is 9681222878.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4922706244 + 3859515625 = 70162^2 + 62125^2 .

It is a cyclic number.

It is not a de Polignac number, because 8782221869 - 2²⁰ = 8781173293 is a prime.

It is a super-2 number, since 2×8782221869² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8782221869.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8782221809) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1088024 + ... + 1096065.

It is an arithmetic number, because the mean of its divisors is an integer number (2196102495).

Almost surely, 2^8782221869 is an apocalyptic number.

It is an amenable number.

8782221869 is a deficient number, since it is larger than the sum of its proper divisors (2188111).

8782221869 is a wasteful number, since it uses less digits than its factorization.

8782221869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2188110.

The product of its digits is 1548288, while the sum is 53.

The square root of 8782221869 is about 93713.5095330444. The cubic root of 8782221869 is about 2063.1689897375.

The spelling of 8782221869 in words is "eight billion, seven hundred eighty-two million, two hundred twenty-one thousand, eight hundred sixty-nine".