990000000089 has 2 divisors, whose sum is σ = 990000000090. Its totient is φ = 990000000088.

The previous prime is 990000000061. The next prime is 990000000137. The reversal of 990000000089 is 980000000099.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 698327635600 + 291672364489 = 835660^2 + 540067^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-990000000089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 989999999986 and 990000000058.

It is not a weakly prime, because it can be changed into another prime (990000000019) 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, 495000000044 + 495000000045.

It is an arithmetic number, because the mean of its divisors is an integer number (495000000045).

Almost surely, 2^990000000089 is an apocalyptic number.

It is an amenable number.

990000000089 is a deficient number, since it is larger than the sum of its proper divisors (1).

990000000089 is an equidigital number, since it uses as much as digits as its factorization.

990000000089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 35.

The spelling of 990000000089 in words is "nine hundred ninety billion, eighty-nine", and thus it is an aban number.