13423665 has 16 divisors (see below), whose sum is σ = 22219200. Its totient is φ = 6912192.

The previous prime is 13423649. The next prime is 13423667. The reversal of 13423665 is 56632431.

It is not a de Polignac number, because 13423665 - 2⁴ = 13423649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13423667) 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 15 ways as a sum of consecutive naturals, for example, 14995 + ... + 15864.

It is an arithmetic number, because the mean of its divisors is an integer number (1388700).

Almost surely, 2^13423665 is an apocalyptic number.

13423665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13423665 is a deficient number, since it is larger than the sum of its proper divisors (8795535).

13423665 is a wasteful number, since it uses less digits than its factorization.

13423665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30896.

The product of its digits is 12960, while the sum is 30.

The square root of 13423665 is about 3663.8320103411. The cubic root of 13423665 is about 237.6605156822.

The spelling of 13423665 in words is "thirteen million, four hundred twenty-three thousand, six hundred sixty-five".