1289880679 has 2 divisors, whose sum is σ = 1289880680. Its totient is φ = 1289880678.

The previous prime is 1289880677. The next prime is 1289880731. The reversal of 1289880679 is 9760889821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1289880679 - 2¹ = 1289880677 is a prime.

Together with 1289880677, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1289880677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 644940339 + 644940340.

It is an arithmetic number, because the mean of its divisors is an integer number (644940340).

Almost surely, 2^1289880679 is an apocalyptic number.

1289880679 is a deficient number, since it is larger than the sum of its proper divisors (1).

1289880679 is an equidigital number, since it uses as much as digits as its factorization.

1289880679 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3483648, while the sum is 58.

The square root of 1289880679 is about 35914.9088680453. The cubic root of 1289880679 is about 1088.5536687702.

The spelling of 1289880679 in words is "one billion, two hundred eighty-nine million, eight hundred eighty thousand, six hundred seventy-nine".