999995000009 has 2 divisors, whose sum is σ = 999995000010. Its totient is φ = 999995000008.

The previous prime is 999994999999. The next prime is 999995000021. The reversal of 999995000009 is 900000599999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 999994000009 + 1000000 = 999997^2 + 1000^2 .

It is an emirp because it is prime and its reverse (900000599999) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 999995000009 - 2¹² = 999994995913 is a prime.

It is not a weakly prime, because it can be changed into another prime (999995020009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499997500004 + 499997500005.

It is an arithmetic number, because the mean of its divisors is an integer number (499997500005).

Almost surely, 2^999995000009 is an apocalyptic number.

It is an amenable number.

999995000009 is a deficient number, since it is larger than the sum of its proper divisors (1).

999995000009 is an equidigital number, since it uses as much as digits as its factorization.

999995000009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2657205, while the sum is 59.

The spelling of 999995000009 in words is "nine hundred ninety-nine billion, nine hundred ninety-five million, nine", and thus it is an aban number.