1298994289 has 2 divisors, whose sum is σ = 1298994290. Its totient is φ = 1298994288.

The previous prime is 1298994287. The next prime is 1298994373. The reversal of 1298994289 is 9824998921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1208744289 + 90250000 = 34767^2 + 9500^2 .

It is a cyclic number.

It is not a de Polignac number, because 1298994289 - 2¹ = 1298994287 is a prime.

Together with 1298994287, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1298994283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 649497144 + 649497145.

It is an arithmetic number, because the mean of its divisors is an integer number (649497145).

Almost surely, 2^1298994289 is an apocalyptic number.

It is an amenable number.

1298994289 is a deficient number, since it is larger than the sum of its proper divisors (1).

1298994289 is an equidigital number, since it uses as much as digits as its factorization.

1298994289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6718464, while the sum is 61.

The square root of 1298994289 is about 36041.5633539945. The cubic root of 1298994289 is about 1091.1113679331. Note that the first 3 decimals are identical.

The spelling of 1298994289 in words is "one billion, two hundred ninety-eight million, nine hundred ninety-four thousand, two hundred eighty-nine".