989803 has 2 divisors, whose sum is σ = 989804. Its totient is φ = 989802.

The previous prime is 989797. The next prime is 989827. The reversal of 989803 is 308989.

989803 is nontrivially palindromic in base 9.

It is a weak prime.

It is an emirp because it is prime and its reverse (308989) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-989803 is a prime.

989803 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (989873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494901 + 494902.

It is an arithmetic number, because the mean of its divisors is an integer number (494902).

2⁹⁸⁹⁸⁰³ is an apocalyptic number.

989803 is a deficient number, since it is larger than the sum of its proper divisors (1).

989803 is an equidigital number, since it uses as much as digits as its factorization.

989803 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 989803 is about 994.8884359565. Note that the first 3 decimals coincide. The cubic root of 989803 is about 99.6589380902.

The spelling of 989803 in words is "nine hundred eighty-nine thousand, eight hundred three".