990620655203 has 2 divisors, whose sum is σ = 990620655204. Its totient is φ = 990620655202.

The previous prime is 990620655181. The next prime is 990620655247. The reversal of 990620655203 is 302556026099.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (302556026099) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 990620655203 - 2²⁴ = 990603877987 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (990620651203) 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, 495310327601 + 495310327602.

It is an arithmetic number, because the mean of its divisors is an integer number (495310327602).

Almost surely, 2^990620655203 is an apocalyptic number.

990620655203 is a deficient number, since it is larger than the sum of its proper divisors (1).

990620655203 is an equidigital number, since it uses as much as digits as its factorization.

990620655203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 874800, while the sum is 47.

The spelling of 990620655203 in words is "nine hundred ninety billion, six hundred twenty million, six hundred fifty-five thousand, two hundred three".