12789099989 has 2 divisors, whose sum is σ = 12789099990. Its totient is φ = 12789099988.

The previous prime is 12789099977. The next prime is 12789100007. The reversal of 12789099989 is 98999098721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12739636900 + 49463089 = 112870^2 + 7033^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12789099989 is a prime.

It is a super-2 number, since 2×12789099989² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12789096989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6394549994 + 6394549995.

It is an arithmetic number, because the mean of its divisors is an integer number (6394549995).

Almost surely, 2^12789099989 is an apocalyptic number.

It is an amenable number.

12789099989 is a deficient number, since it is larger than the sum of its proper divisors (1).

12789099989 is an equidigital number, since it uses as much as digits as its factorization.

12789099989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 52907904, while the sum is 71.

The spelling of 12789099989 in words is "twelve billion, seven hundred eighty-nine million, ninety-nine thousand, nine hundred eighty-nine".