404455423 has 2 divisors, whose sum is σ = 404455424. Its totient is φ = 404455422.

The previous prime is 404455421. The next prime is 404455433. The reversal of 404455423 is 324554404.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 404455423 - 2¹ = 404455421 is a prime.

Together with 404455421, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (404455421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202227711 + 202227712.

It is an arithmetic number, because the mean of its divisors is an integer number (202227712).

Almost surely, 2^404455423 is an apocalyptic number.

404455423 is a deficient number, since it is larger than the sum of its proper divisors (1).

404455423 is an equidigital number, since it uses as much as digits as its factorization.

404455423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38400, while the sum is 31.

The square root of 404455423 is about 20111.0771218252. The cubic root of 404455423 is about 739.5318581535.

The spelling of 404455423 in words is "four hundred four million, four hundred fifty-five thousand, four hundred twenty-three".