8820688409 has 4 divisors (see below), whose sum is σ = 9499202916. Its totient is φ = 8142173904.

The previous prime is 8820688397. The next prime is 8820688417. The reversal of 8820688409 is 9048860288.

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 907696384 + 7912992025 = 30128^2 + 88955^2 .

It is a cyclic number.

It is not a de Polignac number, because 8820688409 - 2²⁰ = 8819639833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8820688109) 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, 339257234 + ... + 339257259.

It is an arithmetic number, because the mean of its divisors is an integer number (2374800729).

Almost surely, 2^8820688409 is an apocalyptic number.

It is an amenable number.

8820688409 is a deficient number, since it is larger than the sum of its proper divisors (678514507).

8820688409 is a wasteful number, since it uses less digits than its factorization.

8820688409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 678514506.

The product of its (nonzero) digits is 1769472, while the sum is 53.

The square root of 8820688409 is about 93918.5200532887. The cubic root of 8820688409 is about 2066.1768611554.

The spelling of 8820688409 in words is "eight billion, eight hundred twenty million, six hundred eighty-eight thousand, four hundred nine".