990361 has 2 divisors, whose sum is σ = 990362. Its totient is φ = 990360.

The previous prime is 990359. The next prime is 990371. The reversal of 990361 is 163099.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 891136 + 99225 = 944^2 + 315^2 .

It is a cyclic number.

It is not a de Polignac number, because 990361 - 2¹ = 990359 is a prime.

Together with 990359, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (990331) 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, 495180 + 495181.

It is an arithmetic number, because the mean of its divisors is an integer number (495181).

2⁹⁹⁰³⁶¹ is an apocalyptic number.

It is an amenable number.

990361 is a deficient number, since it is larger than the sum of its proper divisors (1).

990361 is an equidigital number, since it uses as much as digits as its factorization.

990361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1458, while the sum is 28.

The square root of 990361 is about 995.1688298977. The cubic root of 990361 is about 99.6776620992.

The spelling of 990361 in words is "nine hundred ninety thousand, three hundred sixty-one".