12820079 has 4 divisors (see below), whose sum is σ = 13494840. Its totient is φ = 12145320.

The previous prime is 12820061. The next prime is 12820099. The reversal of 12820079 is 97002821.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97002821 = 1381 ⋅70241.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12820079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12820009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 337352 + ... + 337389.

It is an arithmetic number, because the mean of its divisors is an integer number (3373710).

Almost surely, 2^12820079 is an apocalyptic number.

12820079 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

12820079 is a deficient number, since it is larger than the sum of its proper divisors (674761).

12820079 is an equidigital number, since it uses as much as digits as its factorization.

12820079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 674760.

The product of its (nonzero) digits is 2016, while the sum is 29.

The square root of 12820079 is about 3580.5137899469. The cubic root of 12820079 is about 234.0436704722.

The spelling of 12820079 in words is "twelve million, eight hundred twenty thousand, seventy-nine".