404000423 has 2 divisors, whose sum is σ = 404000424. Its totient is φ = 404000422.

The previous prime is 404000417. The next prime is 404000449. The reversal of 404000423 is 324000404.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 404000423 - 2¹⁶ = 403934887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (404000453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202000211 + 202000212.

It is an arithmetic number, because the mean of its divisors is an integer number (202000212).

Almost surely, 2^404000423 is an apocalyptic number.

404000423 is a deficient number, since it is larger than the sum of its proper divisors (1).

404000423 is an equidigital number, since it uses as much as digits as its factorization.

404000423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 404000423 is about 20099.7617647573. The cubic root of 404000423 is about 739.2544371783.

Adding to 404000423 its reverse (324000404), we get a palindrome (728000827).

The spelling of 404000423 in words is "four hundred four million, four hundred twenty-three", and thus it is an aban number.