1289168912 has 10 divisors (see below), whose sum is σ = 2497764798. Its totient is φ = 644584448.

The previous prime is 1289168891. The next prime is 1289168921. The reversal of 1289168912 is 2198619821.

It can be written as a sum of positive squares in only one way, i.e., 787588096 + 501580816 = 28064^2 + 22396^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40286513 + ... + 40286544.

Almost surely, 2^1289168912 is an apocalyptic number.

It is an amenable number.

1289168912 is a deficient number, since it is larger than the sum of its proper divisors (1208595886).

1289168912 is an equidigital number, since it uses as much as digits as its factorization.

1289168912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80573065 (or 80573059 counting only the distinct ones).

The product of its digits is 124416, while the sum is 47.

The square root of 1289168912 is about 35904.9984264030. The cubic root of 1289168912 is about 1088.3534075758.

The spelling of 1289168912 in words is "one billion, two hundred eighty-nine million, one hundred sixty-eight thousand, nine hundred twelve".