823903 has 2 divisors, whose sum is σ = 823904. Its totient is φ = 823902.

The previous prime is 823877. The next prime is 823913. The reversal of 823903 is 309328.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-823903 is a prime.

823903 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (823913) 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 as a sum of consecutive naturals, namely, 411951 + 411952.

It is an arithmetic number, because the mean of its divisors is an integer number (411952).

2⁸²³⁹⁰³ is an apocalyptic number.

823903 is a deficient number, since it is larger than the sum of its proper divisors (1).

823903 is an equidigital number, since it uses as much as digits as its factorization.

823903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 823903 is about 907.6910267266. The cubic root of 823903 is about 93.7472840695.

The spelling of 823903 in words is "eight hundred twenty-three thousand, nine hundred three".