990203827 has 2 divisors, whose sum is σ = 990203828. Its totient is φ = 990203826.

The previous prime is 990203821. The next prime is 990203831. The reversal of 990203827 is 728302099.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 990203827 - 2¹⁵ = 990171059 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 990203827.

It is not a weakly prime, because it can be changed into another prime (990203821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495101913 + 495101914.

It is an arithmetic number, because the mean of its divisors is an integer number (495101914).

Almost surely, 2^990203827 is an apocalyptic number.

990203827 is a deficient number, since it is larger than the sum of its proper divisors (1).

990203827 is an equidigital number, since it uses as much as digits as its factorization.

990203827 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 990203827 is about 31467.5043020574. The cubic root of 990203827 is about 996.7238878097.

The spelling of 990203827 in words is "nine hundred ninety million, two hundred three thousand, eight hundred twenty-seven".