7989271929 has 12 divisors (see below), whose sum is σ = 11542108500. Its totient is φ = 5325235584.

The previous prime is 7989271921. The next prime is 7989271963. The reversal of 7989271929 is 9291729897.

It can be written as a sum of positive squares in 2 ways, for example, as 5696777529 + 2292494400 = 75477^2 + 47880^2 .

It is not a de Polignac number, because 7989271929 - 2³ = 7989271921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7989271921) 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, 23244 + ... + 128525.

It is an arithmetic number, because the mean of its divisors is an integer number (961842375).

Almost surely, 2^7989271929 is an apocalyptic number.

It is an amenable number.

7989271929 is a deficient number, since it is larger than the sum of its proper divisors (3552836571).

7989271929 is a wasteful number, since it uses less digits than its factorization.

7989271929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157624 (or 157621 counting only the distinct ones).

The product of its digits is 10287648, while the sum is 63.

The square root of 7989271929 is about 89382.7272407818. The cubic root of 7989271929 is about 1999.1055941621.

The spelling of 7989271929 in words is "seven billion, nine hundred eighty-nine million, two hundred seventy-one thousand, nine hundred twenty-nine".