990624443 has 2 divisors, whose sum is σ = 990624444. Its totient is φ = 990624442.

The previous prime is 990624419. The next prime is 990624449. The reversal of 990624443 is 344426099.

It is a strong prime.

It is an emirp because it is prime and its reverse (344426099) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 990624443 - 2¹⁰ = 990623419 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 990624443.

It is not a weakly prime, because it can be changed into another prime (990624449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495312221 + 495312222.

It is an arithmetic number, because the mean of its divisors is an integer number (495312222).

Almost surely, 2^990624443 is an apocalyptic number.

990624443 is a deficient number, since it is larger than the sum of its proper divisors (1).

990624443 is an equidigital number, since it uses as much as digits as its factorization.

990624443 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 186624, while the sum is 41.

The square root of 990624443 is about 31474.1869315158. The cubic root of 990624443 is about 996.8649963560.

The spelling of 990624443 in words is "nine hundred ninety million, six hundred twenty-four thousand, four hundred forty-three".