990583999997 has 2 divisors, whose sum is σ = 990583999998. Its totient is φ = 990583999996.

The previous prime is 990583999991. The next prime is 990584000009. The reversal of 990583999997 is 799999385099.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 978083418361 + 12500581636 = 988981^2 + 111806^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-990583999997 is a prime.

It is a super-2 number, since 2×990583999997² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (990583999991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495291999998 + 495291999999.

It is an arithmetic number, because the mean of its divisors is an integer number (495291999999).

Almost surely, 2^990583999997 is an apocalyptic number.

It is an amenable number.

990583999997 is a deficient number, since it is larger than the sum of its proper divisors (1).

990583999997 is an equidigital number, since it uses as much as digits as its factorization.

990583999997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4017693960, while the sum is 86.

The spelling of 990583999997 in words is "nine hundred ninety billion, five hundred eighty-three million, nine hundred ninety-nine thousand, nine hundred ninety-seven".