8435348821 has 4 divisors (see below), whose sum is σ = 8435805772. Its totient is φ = 8434891872.

The previous prime is 8435348809. The next prime is 8435348849. The reversal of 8435348821 is 1288435348.

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 5709464721 + 2725884100 = 75561^2 + 52210^2 .

It is a cyclic number.

It is not a de Polignac number, because 8435348821 - 2⁹ = 8435348309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8435348891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 199566 + ... + 238111.

It is an arithmetic number, because the mean of its divisors is an integer number (2108951443).

Almost surely, 2^8435348821 is an apocalyptic number.

It is an amenable number.

8435348821 is a deficient number, since it is larger than the sum of its proper divisors (456951).

8435348821 is a wasteful number, since it uses less digits than its factorization.

8435348821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456950.

The product of its digits is 737280, while the sum is 46.

The square root of 8435348821 is about 91844.1550726011. The cubic root of 8435348821 is about 2035.6401844614.

The spelling of 8435348821 in words is "eight billion, four hundred thirty-five million, three hundred forty-eight thousand, eight hundred twenty-one".