12978699 has 4 divisors (see below), whose sum is σ = 17304936. Its totient is φ = 8652464.

The previous prime is 12978683. The next prime is 12978709. The reversal of 12978699 is 99687921.

It is a happy number.

12978699 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12978699 - 2⁴ = 12978683 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12978619) 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, 2163114 + ... + 2163119.

It is an arithmetic number, because the mean of its divisors is an integer number (4326234).

Almost surely, 2^12978699 is an apocalyptic number.

12978699 is a deficient number, since it is larger than the sum of its proper divisors (4326237).

12978699 is an equidigital number, since it uses as much as digits as its factorization.

12978699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4326236.

The product of its digits is 489888, while the sum is 51.

The square root of 12978699 is about 3602.5961472249. The cubic root of 12978699 is about 235.0049734876.

The spelling of 12978699 in words is "twelve million, nine hundred seventy-eight thousand, six hundred ninety-nine".