8442797979 has 32 divisors (see below), whose sum is σ = 14644998144. Its totient is φ = 4195176480.

The previous prime is 8442797971. The next prime is 8442798083. The reversal of 8442797979 is 9797972448.

It is a happy number.

It is not a de Polignac number, because 8442797979 - 2³ = 8442797971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (8442797971) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 789229 + ... + 799854.

It is an arithmetic number, because the mean of its divisors is an integer number (457656192).

Almost surely, 2^8442797979 is an apocalyptic number.

8442797979 is a deficient number, since it is larger than the sum of its proper divisors (6202200165).

8442797979 is a wasteful number, since it uses less digits than its factorization.

8442797979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1589127.

The product of its digits is 64012032, while the sum is 66.

The square root of 8442797979 is about 91884.6993737260. The cubic root of 8442797979 is about 2036.2392248494.

It can be divided in two parts, 844279 and 7979, that added together give a palindrome (852258).

The spelling of 8442797979 in words is "eight billion, four hundred forty-two million, seven hundred ninety-seven thousand, nine hundred seventy-nine".