7984421705 has 32 divisors (see below), whose sum is σ = 10982780928. Its totient is φ = 5520153600.

The previous prime is 7984421701. The next prime is 7984421717. The reversal of 7984421705 is 5071244897.

It is not a de Polignac number, because 7984421705 - 2² = 7984421701 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 7984421705.

It is not an unprimeable number, because it can be changed into a prime (7984421701) 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 31 ways as a sum of consecutive naturals, for example, 192140 + ... + 229970.

It is an arithmetic number, because the mean of its divisors is an integer number (343211904).

Almost surely, 2^7984421705 is an apocalyptic number.

It is an amenable number.

7984421705 is a deficient number, since it is larger than the sum of its proper divisors (2998359223).

7984421705 is a wasteful number, since it uses less digits than its factorization.

7984421705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38057.

The product of its (nonzero) digits is 564480, while the sum is 47.

The square root of 7984421705 is about 89355.5913471563. The cubic root of 7984421705 is about 1998.7009651870.

The spelling of 7984421705 in words is "seven billion, nine hundred eighty-four million, four hundred twenty-one thousand, seven hundred five".