13239789 has 16 divisors (see below), whose sum is σ = 19392000. Its totient is φ = 7997616.

The previous prime is 13239781. The next prime is 13239823. The reversal of 13239789 is 98793231.

13239789 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13239789 - 2³ = 13239781 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 13239789.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13239781) 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, 3739 + ... + 6360.

It is an arithmetic number, because the mean of its divisors is an integer number (1212000).

Almost surely, 2^13239789 is an apocalyptic number.

13239789 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

13239789 is a deficient number, since it is larger than the sum of its proper divisors (6152211).

13239789 is a wasteful number, since it uses less digits than its factorization.

13239789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10144.

The product of its digits is 81648, while the sum is 42.

The square root of 13239789 is about 3638.6520855943. The cubic root of 13239789 is about 236.5703730016.

It can be divided in two parts, 13239 and 789, that added together give a triangular number (14028 = T₁₆₇).

The spelling of 13239789 in words is "thirteen million, two hundred thirty-nine thousand, seven hundred eighty-nine".