1289314984 has 8 divisors (see below), whose sum is σ = 2417465610. Its totient is φ = 644657488.

The previous prime is 1289314981. The next prime is 1289314993. The reversal of 1289314984 is 4894139821.

It can be written as a sum of positive squares in only one way, i.e., 1094154084 + 195160900 = 33078^2 + 13970^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (1289314981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80582179 + ... + 80582194.

Almost surely, 2^1289314984 is an apocalyptic number.

It is an amenable number.

1289314984 is a deficient number, since it is larger than the sum of its proper divisors (1128150626).

1289314984 is a wasteful number, since it uses less digits than its factorization.

1289314984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161164379 (or 161164375 counting only the distinct ones).

The product of its digits is 497664, while the sum is 49.

The square root of 1289314984 is about 35907.0325145368. The cubic root of 1289314984 is about 1088.3945120821.

The spelling of 1289314984 in words is "one billion, two hundred eighty-nine million, three hundred fourteen thousand, nine hundred eighty-four".