990316801 has 2 divisors, whose sum is σ = 990316802. Its totient is φ = 990316800.

The previous prime is 990316799. The next prime is 990316823. The reversal of 990316801 is 108613099.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 703522576 + 286794225 = 26524^2 + 16935^2 .

It is a cyclic number.

It is not a de Polignac number, because 990316801 - 2¹ = 990316799 is a prime.

Together with 990316799, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (990316001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495158400 + 495158401.

It is an arithmetic number, because the mean of its divisors is an integer number (495158401).

Almost surely, 2^990316801 is an apocalyptic number.

It is an amenable number.

990316801 is a deficient number, since it is larger than the sum of its proper divisors (1).

990316801 is an equidigital number, since it uses as much as digits as its factorization.

990316801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 37.

The square root of 990316801 is about 31469.2993407861. The cubic root of 990316801 is about 996.7617923297.

The spelling of 990316801 in words is "nine hundred ninety million, three hundred sixteen thousand, eight hundred one".