13223737 has 4 divisors (see below), whose sum is σ = 13248036. Its totient is φ = 13199440.

The previous prime is 13223699. The next prime is 13223759. The reversal of 13223737 is 73732231.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 73732231 = 37 ⋅1992763.

It can be written as a sum of positive squares in 2 ways, for example, as 8156736 + 5067001 = 2856^2 + 2251^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13223737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13223767) 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 in 3 ways as a sum of consecutive naturals, for example, 11314 + ... + 12427.

It is an arithmetic number, because the mean of its divisors is an integer number (3312009).

Almost surely, 2^13223737 is an apocalyptic number.

It is an amenable number.

13223737 is a deficient number, since it is larger than the sum of its proper divisors (24299).

13223737 is an equidigital number, since it uses as much as digits as its factorization.

13223737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24298.

The product of its digits is 5292, while the sum is 28.

The square root of 13223737 is about 3636.4456547569. The cubic root of 13223737 is about 236.4747278888.

Adding to 13223737 its reverse (73732231), we get a palindrome (86955968).

The spelling of 13223737 in words is "thirteen million, two hundred twenty-three thousand, seven hundred thirty-seven".