12923909 has 2 divisors, whose sum is σ = 12923910. Its totient is φ = 12923908.

The previous prime is 12923903. The next prime is 12923921. The reversal of 12923909 is 90932921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9302500 + 3621409 = 3050^2 + 1903^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12923909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12923903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6461954 + 6461955.

It is an arithmetic number, because the mean of its divisors is an integer number (6461955).

Almost surely, 2^12923909 is an apocalyptic number.

It is an amenable number.

12923909 is a deficient number, since it is larger than the sum of its proper divisors (1).

12923909 is an equidigital number, since it uses as much as digits as its factorization.

12923909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8748, while the sum is 35.

The square root of 12923909 is about 3594.9838664450. The cubic root of 12923909 is about 234.6738133351.

The spelling of 12923909 in words is "twelve million, nine hundred twenty-three thousand, nine hundred nine".