7989975129 has 32 divisors (see below), whose sum is σ = 11835742464. Its totient is φ = 4768727040.

The previous prime is 7989975127. The next prime is 7989975151. The reversal of 7989975129 is 9215799897.

It is not a de Polignac number, because 7989975129 - 2¹ = 7989975127 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7989975129.

It is not an unprimeable number, because it can be changed into a prime (7989975127) 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, 193497 + ... + 231129.

It is an arithmetic number, because the mean of its divisors is an integer number (369866952).

Almost surely, 2^7989975129 is an apocalyptic number.

It is an amenable number.

7989975129 is a deficient number, since it is larger than the sum of its proper divisors (3845767335).

7989975129 is a wasteful number, since it uses less digits than its factorization.

7989975129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37857.

The product of its digits is 25719120, while the sum is 66.

The square root of 7989975129 is about 89386.6608001440. The cubic root of 7989975129 is about 1999.1642448887.

The spelling of 7989975129 in words is "seven billion, nine hundred eighty-nine million, nine hundred seventy-five thousand, one hundred twenty-nine".