320923 has 2 divisors, whose sum is σ = 320924. Its totient is φ = 320922.

The previous prime is 320911. The next prime is 320927. The reversal of 320923 is 329023.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 320923 - 2¹⁷ = 189851 is a prime.

It is the 567-th Hogben number.

It is a self number, because there is not a number n which added to its sum of digits gives 320923.

It is not a weakly prime, because it can be changed into another prime (320927) by changing a digit.

It is a nontrivial repunit in base 566.

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, 160461 + 160462.

It is an arithmetic number, because the mean of its divisors is an integer number (160462).

2³²⁰⁹²³ is an apocalyptic number.

320923 is a deficient number, since it is larger than the sum of its proper divisors (1).

320923 is an equidigital number, since it uses as much as digits as its factorization.

320923 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 320923 is about 566.5006619590. The cubic root of 320923 is about 68.4647375649.

Adding to 320923 its reverse (329023), we get a palindrome (649946).

Subtracting 320923 from its reverse (329023), we obtain a square (8100 = 90²).

The spelling of 320923 in words is "three hundred twenty thousand, nine hundred twenty-three".