12840323 has 2 divisors, whose sum is σ = 12840324. Its totient is φ = 12840322.

The previous prime is 12840319. The next prime is 12840337. The reversal of 12840323 is 32304821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12840323 - 2² = 12840319 is a prime.

It is not a weakly prime, because it can be changed into another prime (12840313) 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 as a sum of consecutive naturals, namely, 6420161 + 6420162.

It is an arithmetic number, because the mean of its divisors is an integer number (6420162).

Almost surely, 2^12840323 is an apocalyptic number.

12840323 is a deficient number, since it is larger than the sum of its proper divisors (1).

12840323 is an equidigital number, since it uses as much as digits as its factorization.

12840323 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 12840323 is about 3583.3396434053. The cubic root of 12840323 is about 234.1667973359.

The spelling of 12840323 in words is "twelve million, eight hundred forty thousand, three hundred twenty-three".