13223439 has 16 divisors (see below), whose sum is σ = 19861600. Its totient is φ = 8693568.

The previous prime is 13223437. The next prime is 13223461. The reversal of 13223439 is 93432231.

It is a happy number.

13223439 is a `hidden beast` number, since 1 + 3 + 223 + 439 = 666.

13223439 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13223439 - 2¹ = 13223437 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13223437) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1384 + ... + 5325.

It is an arithmetic number, because the mean of its divisors is an integer number (1241350).

Almost surely, 2^13223439 is an apocalyptic number.

13223439 is a deficient number, since it is larger than the sum of its proper divisors (6638161).

13223439 is an equidigital number, since it uses as much as digits as its factorization.

13223439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6791 (or 6785 counting only the distinct ones).

The product of its digits is 3888, while the sum is 27.

The square root of 13223439 is about 3636.4046804502. The cubic root of 13223439 is about 236.4729515377.

It can be divided in two parts, 1322 and 3439, that added together give a square (4761 = 69²).

The spelling of 13223439 in words is "thirteen million, two hundred twenty-three thousand, four hundred thirty-nine".