8291421783 has 12 divisors (see below), whose sum is σ = 11984539320. Its totient is φ = 5523903216.

The previous prime is 8291421779. The next prime is 8291421793. The reversal of 8291421783 is 3871241928.

It is a happy number.

It is not a de Polignac number, because 8291421783 - 2² = 8291421779 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8291421703) 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 11 ways as a sum of consecutive naturals, for example, 295093 + ... + 321966.

It is an arithmetic number, because the mean of its divisors is an integer number (998711610).

Almost surely, 2^8291421783 is an apocalyptic number.

8291421783 is a deficient number, since it is larger than the sum of its proper divisors (3693117537).

8291421783 is a wasteful number, since it uses less digits than its factorization.

8291421783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 618558 (or 618555 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 8291421783 is about 91057.2445388065. The cubic root of 8291421783 is about 2023.9960909556.

The spelling of 8291421783 in words is "eight billion, two hundred ninety-one million, four hundred twenty-one thousand, seven hundred eighty-three".