12408709 has 2 divisors, whose sum is σ = 12408710. Its totient is φ = 12408708.

The previous prime is 12408689. The next prime is 12408743. The reversal of 12408709 is 90780421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12404484 + 4225 = 3522^2 + 65^2 .

It is a cyclic number.

It is not a de Polignac number, because 12408709 - 2⁷ = 12408581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12408779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6204354 + 6204355.

It is an arithmetic number, because the mean of its divisors is an integer number (6204355).

Almost surely, 2^12408709 is an apocalyptic number.

It is an amenable number.

12408709 is a deficient number, since it is larger than the sum of its proper divisors (1).

12408709 is an equidigital number, since it uses as much as digits as its factorization.

12408709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 12408709 is about 3522.5997501845. The cubic root of 12408709 is about 231.5130802879.

The spelling of 12408709 in words is "twelve million, four hundred eight thousand, seven hundred nine".