990373 has 4 divisors (see below), whose sum is σ = 997740. Its totient is φ = 983008.

The previous prime is 990371. The next prime is 990377. The reversal of 990373 is 373099.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 859329 + 131044 = 927^2 + 362^2 .

It is a cyclic number.

It is not a de Polignac number, because 990373 - 2¹ = 990371 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990371) 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 in 3 ways as a sum of consecutive naturals, for example, 3478 + ... + 3751.

It is an arithmetic number, because the mean of its divisors is an integer number (249435).

2⁹⁹⁰³⁷³ is an apocalyptic number.

It is an amenable number.

990373 is a deficient number, since it is larger than the sum of its proper divisors (7367).

990373 is a wasteful number, since it uses less digits than its factorization.

990373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7366.

The product of its (nonzero) digits is 5103, while the sum is 31.

The square root of 990373 is about 995.1748590072. The cubic root of 990373 is about 99.6780646888.

The spelling of 990373 in words is "nine hundred ninety thousand, three hundred seventy-three".