1289461379 has 2 divisors, whose sum is σ = 1289461380. Its totient is φ = 1289461378.

The previous prime is 1289461319. The next prime is 1289461447. The reversal of 1289461379 is 9731649821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1289461379 - 2¹² = 1289457283 is a prime.

It is not a weakly prime, because it can be changed into another prime (1289461319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 644730689 + 644730690.

It is an arithmetic number, because the mean of its divisors is an integer number (644730690).

Almost surely, 2^1289461379 is an apocalyptic number.

1289461379 is a deficient number, since it is larger than the sum of its proper divisors (1).

1289461379 is an equidigital number, since it uses as much as digits as its factorization.

1289461379 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 653184, while the sum is 50.

The square root of 1289461379 is about 35909.0709849197. The cubic root of 1289461379 is about 1088.4357043654.

The spelling of 1289461379 in words is "one billion, two hundred eighty-nine million, four hundred sixty-one thousand, three hundred seventy-nine".