990853 has 4 divisors (see below), whose sum is σ = 1022848. Its totient is φ = 958860.

The previous prime is 990851. The next prime is 990881. The reversal of 990853 is 358099.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 358099 = 7 ⋅51157.

It is a cyclic number.

It is not a de Polignac number, because 990853 - 2¹ = 990851 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (990851) 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, 15951 + ... + 16012.

It is an arithmetic number, because the mean of its divisors is an integer number (255712).

2⁹⁹⁰⁸⁵³ is an apocalyptic number.

It is an amenable number.

990853 is a deficient number, since it is larger than the sum of its proper divisors (31995).

990853 is a wasteful number, since it uses less digits than its factorization.

990853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31994.

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 990853 is about 995.4159934419. The cubic root of 990853 is about 99.6941656068.

The spelling of 990853 in words is "nine hundred ninety thousand, eight hundred fifty-three".