249803 has 4 divisors (see below), whose sum is σ = 260688. Its totient is φ = 238920.

The previous prime is 249797. The next prime is 249811. The reversal of 249803 is 308942.

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

It is a cyclic number.

It is not a de Polignac number, because 249803 - 2¹⁰ = 248779 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 249803.

It is not an unprimeable number, because it can be changed into a prime (249833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5408 + ... + 5453.

It is an arithmetic number, because the mean of its divisors is an integer number (65172).

2²⁴⁹⁸⁰³ is an apocalyptic number.

249803 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

249803 is a deficient number, since it is larger than the sum of its proper divisors (10885).

249803 is a wasteful number, since it uses less digits than its factorization.

249803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10884.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 249803 is about 499.8029611757. The cubic root of 249803 is about 62.9795011834.

The spelling of 249803 in words is "two hundred forty-nine thousand, eight hundred three".