13423905 has 48 divisors (see below), whose sum is σ = 25968384. Its totient is φ = 6359040.

The previous prime is 13423903. The next prime is 13423909. The reversal of 13423905 is 50932431.

It is not a de Polignac number, because 13423905 - 2¹ = 13423903 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13423901) 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 in 47 ways as a sum of consecutive naturals, for example, 22977 + ... + 23553.

It is an arithmetic number, because the mean of its divisors is an integer number (541008).

Almost surely, 2^13423905 is an apocalyptic number.

13423905 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13423905 is a deficient number, since it is larger than the sum of its proper divisors (12544479).

13423905 is a wasteful number, since it uses less digits than its factorization.

13423905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646 (or 643 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 13423905 is about 3663.8647627881. The cubic root of 13423905 is about 237.6619320412.

The spelling of 13423905 in words is "thirteen million, four hundred twenty-three thousand, nine hundred five".