12001709 has 2 divisors, whose sum is σ = 12001710. Its totient is φ = 12001708.

The previous prime is 12001697. The next prime is 12001723. The reversal of 12001709 is 90710021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11356900 + 644809 = 3370^2 + 803^2 .

It is a cyclic number.

It is not a de Polignac number, because 12001709 - 2⁸ = 12001453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12001799) 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, 6000854 + 6000855.

It is an arithmetic number, because the mean of its divisors is an integer number (6000855).

Almost surely, 2^12001709 is an apocalyptic number.

It is an amenable number.

12001709 is a deficient number, since it is larger than the sum of its proper divisors (1).

12001709 is an equidigital number, since it uses as much as digits as its factorization.

12001709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 126, while the sum is 20.

The square root of 12001709 is about 3464.3482792583. The cubic root of 12001709 is about 228.9537164205.

The spelling of 12001709 in words is "twelve million, one thousand, seven hundred nine".