999999999999089 has 2 divisors, whose sum is σ = 999999999999090. Its totient is φ = 999999999999088.

The previous prime is 999999999999071. The next prime is 999999999999103. The reversal of 999999999999089 is 980999999999999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 943399430476864 + 56600569522225 = 30714808^2 + 7523335^2 .

It is a cyclic number.

It is not a de Polignac number, because 999999999999089 - 2³² = 999995705031793 is a prime.

It is a super-9 number, since 9×999999999999089⁹ (a number of 136 digits) contains 999999999 as substring.

It is not a weakly prime, because it can be changed into another prime (999999999999389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499999999999544 + 499999999999545.

It is an arithmetic number, because the mean of its divisors is an integer number (499999999999545).

Almost surely, 2^{999999999999089} is an apocalyptic number.

It is an amenable number.

999999999999089 is a deficient number, since it is larger than the sum of its proper divisors (1).

999999999999089 is an equidigital number, since it uses as much as digits as its factorization.

999999999999089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20334926626632, while the sum is 125.

The spelling of 999999999999089 in words is "nine hundred ninety-nine trillion, nine hundred ninety-nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, eighty-nine".