623423 has 2 divisors, whose sum is σ = 623424. Its totient is φ = 623422.

The previous prime is 623417. The next prime is 623431. The reversal of 623423 is 324326.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 623423 - 2¹⁰ = 622399 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 623395 and 623404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (623023) 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, 311711 + 311712.

It is an arithmetic number, because the mean of its divisors is an integer number (311712).

2⁶²³⁴²³ is an apocalyptic number.

623423 is a deficient number, since it is larger than the sum of its proper divisors (1).

623423 is an equidigital number, since it uses as much as digits as its factorization.

623423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864, while the sum is 20.

The square root of 623423 is about 789.5714027243. The cubic root of 623423 is about 85.4268265792.

Adding to 623423 its reverse (324326), we get a palindrome (947749).

It can be divided in two parts, 62 and 3423, that multiplied together give a triangular number (212226 = T₆₅₁).

The spelling of 623423 in words is "six hundred twenty-three thousand, four hundred twenty-three".