8129909252 has 12 divisors (see below), whose sum is σ = 15064243740. Its totient is φ = 3825839616.

The previous prime is 8129909237. The next prime is 8129909287. The reversal of 8129909252 is 2529099218.

It can be written as a sum of positive squares in 2 ways, for example, as 2199985216 + 5929924036 = 46904^2 + 77006^2 .

It is a junction number, because it is equal to n+sod(n) for n = 8129909197 and 8129909206.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59778677 + ... + 59778812.

It is an arithmetic number, because the mean of its divisors is an integer number (1255353645).

Almost surely, 2^8129909252 is an apocalyptic number.

It is an amenable number.

8129909252 is a deficient number, since it is larger than the sum of its proper divisors (6934334488).

8129909252 is a wasteful number, since it uses less digits than its factorization.

8129909252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119557510 (or 119557508 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 47.

The square root of 8129909252 is about 90166.0094048750. The cubic root of 8129909252 is about 2010.7676953318.

The spelling of 8129909252 in words is "eight billion, one hundred twenty-nine million, nine hundred nine thousand, two hundred fifty-two".