312803 has 4 divisors (see below), whose sum is σ = 313968. Its totient is φ = 311640.

The previous prime is 312799. The next prime is 312839. The reversal of 312803 is 308213.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 312803 - 2² = 312799 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 312803.

It is not an unprimeable number, because it can be changed into a prime (312863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50 + ... + 792.

It is an arithmetic number, because the mean of its divisors is an integer number (78492).

2³¹²⁸⁰³ is an apocalyptic number.

312803 is a deficient number, since it is larger than the sum of its proper divisors (1165).

312803 is an equidigital number, since it uses as much as digits as its factorization.

312803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1164.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 312803 is about 559.2879401525. The cubic root of 312803 is about 67.8823658244.

The spelling of 312803 in words is "three hundred twelve thousand, eight hundred three".