8321870449 has 4 divisors (see below), whose sum is σ = 8345715700. Its totient is φ = 8298025200.

The previous prime is 8321870443. The next prime is 8321870471. The reversal of 8321870449 is 9440781238.

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 6603187600 + 1718682849 = 81260^2 + 41457^2 .

It is a cyclic number.

It is not a de Polignac number, because 8321870449 - 2⁷ = 8321870321 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8321870399 and 8321870408.

It is not an unprimeable number, because it can be changed into a prime (8321870443) 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, 11922102 + ... + 11922799.

It is an arithmetic number, because the mean of its divisors is an integer number (2086428925).

Almost surely, 2^8321870449 is an apocalyptic number.

It is an amenable number.

8321870449 is a deficient number, since it is larger than the sum of its proper divisors (23845251).

8321870449 is a wasteful number, since it uses less digits than its factorization.

8321870449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23845250.

The product of its (nonzero) digits is 387072, while the sum is 46.

The square root of 8321870449 is about 91224.2865085828. The cubic root of 8321870449 is about 2026.4706442589.

The spelling of 8321870449 in words is "eight billion, three hundred twenty-one million, eight hundred seventy thousand, four hundred forty-nine".