8427342321 has 12 divisors (see below), whose sum is σ = 12230521680. Its totient is φ = 5591600280.

The previous prime is 8427342317. The next prime is 8427342383. The reversal of 8427342321 is 1232437248.

It is a happy number.

It is not a de Polignac number, because 8427342321 - 2² = 8427342317 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8427342311) 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, 2216991 + ... + 2220788.

It is an arithmetic number, because the mean of its divisors is an integer number (1019210140).

Almost surely, 2^8427342321 is an apocalyptic number.

It is an amenable number.

8427342321 is a deficient number, since it is larger than the sum of its proper divisors (3803179359).

8427342321 is a wasteful number, since it uses less digits than its factorization.

8427342321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4437996 (or 4437993 counting only the distinct ones).

The product of its digits is 64512, while the sum is 36.

The square root of 8427342321 is about 91800.5573022299. The cubic root of 8427342321 is about 2034.9959308255.

Adding to 8427342321 its reverse (1232437248), we get a palindrome (9659779569).

The spelling of 8427342321 in words is "eight billion, four hundred twenty-seven million, three hundred forty-two thousand, three hundred twenty-one".