13212389 has 4 divisors (see below), whose sum is σ = 13265280. Its totient is φ = 13159500.

The previous prime is 13212377. The next prime is 13212403. The reversal of 13212389 is 98321231.

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 not a de Polignac number, because 13212389 - 2¹⁶ = 13146853 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13212289) 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, 26069 + ... + 26570.

It is an arithmetic number, because the mean of its divisors is an integer number (3316320).

Almost surely, 2^13212389 is an apocalyptic number.

It is an amenable number.

13212389 is a deficient number, since it is larger than the sum of its proper divisors (52891).

13212389 is an equidigital number, since it uses as much as digits as its factorization.

13212389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52890.

The product of its digits is 2592, while the sum is 29.

The square root of 13212389 is about 3634.8850050586. The cubic root of 13212389 is about 236.4070646354.

It can be divided in two parts, 132 and 12389, that added together give a palindrome (12521).

The spelling of 13212389 in words is "thirteen million, two hundred twelve thousand, three hundred eighty-nine".