823403 has 16 divisors (see below), whose sum is σ = 1021440. Its totient is φ = 648000.

The previous prime is 823399. The next prime is 823421. The reversal of 823403 is 304328.

It is a cyclic number.

It is not a de Polignac number, because 823403 - 2² = 823399 is a prime.

It is a nialpdrome in base 7.

It is not an unprimeable number, because it can be changed into a prime (823483) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5378 + ... + 5528.

It is an arithmetic number, because the mean of its divisors is an integer number (63840).

2⁸²³⁴⁰³ is an apocalyptic number.

823403 is a deficient number, since it is larger than the sum of its proper divisors (198037).

823403 is a wasteful number, since it uses less digits than its factorization.

823403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 823403 is about 907.4155608099. The cubic root of 823403 is about 93.7283161702.

The spelling of 823403 in words is "eight hundred twenty-three thousand, four hundred three".