12783239 has 8 divisors (see below), whose sum is σ = 15244800. Its totient is φ = 10480536.

The previous prime is 12783223. The next prime is 12783283. The reversal of 12783239 is 93238721.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12783239 - 2⁴ = 12783223 is a prime.

It is a super-2 number, since 2×12783239² = 326822398662242, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 6.

It is a junction number, because it is equal to n+sod(n) for n = 12783199 and 12783208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12783299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39539 + ... + 39860.

It is an arithmetic number, because the mean of its divisors is an integer number (1905600).

Almost surely, 2^12783239 is an apocalyptic number.

12783239 is a deficient number, since it is larger than the sum of its proper divisors (2461561).

12783239 is an equidigital number, since it uses as much as digits as its factorization.

12783239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79429.

The product of its digits is 18144, while the sum is 35.

The square root of 12783239 is about 3575.3655757139. The cubic root of 12783239 is about 233.8192714138.

The spelling of 12783239 in words is "twelve million, seven hundred eighty-three thousand, two hundred thirty-nine".