13223917 has 4 divisors (see below), whose sum is σ = 15113056. Its totient is φ = 11334780.

The previous prime is 13223893. The next prime is 13223923. The reversal of 13223917 is 71932231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13223917 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13223927) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 944559 + ... + 944572.

It is an arithmetic number, because the mean of its divisors is an integer number (3778264).

Almost surely, 2^13223917 is an apocalyptic number.

It is an amenable number.

13223917 is a deficient number, since it is larger than the sum of its proper divisors (1889139).

13223917 is an equidigital number, since it uses as much as digits as its factorization.

13223917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1889138.

The product of its digits is 2268, while the sum is 28.

The square root of 13223917 is about 3636.4704041144. The cubic root of 13223917 is about 236.4758008396.

The spelling of 13223917 in words is "thirteen million, two hundred twenty-three thousand, nine hundred seventeen".