1296665099 has 2 divisors, whose sum is σ = 1296665100. Its totient is φ = 1296665098.

The previous prime is 1296665063. The next prime is 1296665113. The reversal of 1296665099 is 9905666921.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1296665099 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1296665099.

It is not a weakly prime, because it can be changed into another prime (1296665399) 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, 648332549 + 648332550.

It is an arithmetic number, because the mean of its divisors is an integer number (648332550).

Almost surely, 2^1296665099 is an apocalyptic number.

1296665099 is a deficient number, since it is larger than the sum of its proper divisors (1).

1296665099 is an equidigital number, since it uses as much as digits as its factorization.

1296665099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1574640, while the sum is 53.

The square root of 1296665099 is about 36009.2363012603. The cubic root of 1296665099 is about 1090.4588307619.

The spelling of 1296665099 in words is "one billion, two hundred ninety-six million, six hundred sixty-five thousand, ninety-nine".