7989118497 has 24 divisors (see below), whose sum is σ = 11621249640. Its totient is φ = 5288613120.

The previous prime is 7989118481. The next prime is 7989118519. The reversal of 7989118497 is 7948119897.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1504198656 + 6484919841 = 38784^2 + 80529^2 .

It is not a de Polignac number, because 7989118497 - 2⁴ = 7989118481 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7989118297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 955029 + ... + 963357.

It is an arithmetic number, because the mean of its divisors is an integer number (484218735).

Almost surely, 2^7989118497 is an apocalyptic number.

It is an amenable number.

7989118497 is a deficient number, since it is larger than the sum of its proper divisors (3632131143).

7989118497 is a wasteful number, since it uses less digits than its factorization.

7989118497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9073 (or 9070 counting only the distinct ones).

The product of its digits is 9144576, while the sum is 63.

The square root of 7989118497 is about 89381.8689500281. The cubic root of 7989118497 is about 1999.0927966366.

The spelling of 7989118497 in words is "seven billion, nine hundred eighty-nine million, one hundred eighteen thousand, four hundred ninety-seven".