990584000009 has 2 divisors, whose sum is σ = 990584000010. Its totient is φ = 990584000008.

The previous prime is 990583999997. The next prime is 990584000039. The reversal of 990584000009 is 900000485099.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 941815902784 + 48768097225 = 970472^2 + 220835^2 .

It is an emirp because it is prime and its reverse (900000485099) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 990584000009 - 2²⁰ = 990582951433 is a prime.

It is a super-2 number, since 2×990584000009² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (990584000039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495292000004 + 495292000005.

It is an arithmetic number, because the mean of its divisors is an integer number (495292000005).

Almost surely, 2^990584000009 is an apocalyptic number.

It is an amenable number.

990584000009 is a deficient number, since it is larger than the sum of its proper divisors (1).

990584000009 is an equidigital number, since it uses as much as digits as its factorization.

990584000009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 116640, while the sum is 44.

The spelling of 990584000009 in words is "nine hundred ninety billion, five hundred eighty-four million, nine", and thus it is an aban number.