990313 has 2 divisors, whose sum is σ = 990314. Its totient is φ = 990312.

The previous prime is 990307. The next prime is 990323. The reversal of 990313 is 313099.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 851929 + 138384 = 923^2 + 372^2 .

It is a cyclic number.

It is not a de Polignac number, because 990313 - 2⁵ = 990281 is a prime.

990313 is a lucky number.

It is a plaindrome in base 13.

It is not a weakly prime, because it can be changed into another prime (990323) 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, 495156 + 495157.

It is an arithmetic number, because the mean of its divisors is an integer number (495157).

2⁹⁹⁰³¹³ is an apocalyptic number.

It is an amenable number.

990313 is a deficient number, since it is larger than the sum of its proper divisors (1).

990313 is an equidigital number, since it uses as much as digits as its factorization.

990313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 729, while the sum is 25.

The square root of 990313 is about 995.1447130945. The cubic root of 990313 is about 99.6760517082.

The spelling of 990313 in words is "nine hundred ninety thousand, three hundred thirteen".