12909893 has 2 divisors, whose sum is σ = 12909894. Its totient is φ = 12909892.

The previous prime is 12909887. The next prime is 12909907. The reversal of 12909893 is 39890921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9138529 + 3771364 = 3023^2 + 1942^2 .

It is a cyclic number.

It is not a de Polignac number, because 12909893 - 2¹⁰ = 12908869 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12909893.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12909833) 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, 6454946 + 6454947.

It is an arithmetic number, because the mean of its divisors is an integer number (6454947).

Almost surely, 2^12909893 is an apocalyptic number.

It is an amenable number.

12909893 is a deficient number, since it is larger than the sum of its proper divisors (1).

12909893 is an equidigital number, since it uses as much as digits as its factorization.

12909893 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34992, while the sum is 41.

The square root of 12909893 is about 3593.0339547519. The cubic root of 12909893 is about 234.5889479401.

The spelling of 12909893 in words is "twelve million, nine hundred nine thousand, eight hundred ninety-three".