12909973 has 2 divisors, whose sum is σ = 12909974. Its totient is φ = 12909972.

The previous prime is 12909961. The next prime is 12909989. The reversal of 12909973 is 37990921.

12909973 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12909649 + 324 = 3593^2 + 18^2 .

It is an emirp because it is prime and its reverse (37990921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12909973 - 2⁹ = 12909461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12909173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6454986 + 6454987.

It is an arithmetic number, because the mean of its divisors is an integer number (6454987).

Almost surely, 2^12909973 is an apocalyptic number.

It is an amenable number.

12909973 is a deficient number, since it is larger than the sum of its proper divisors (1).

12909973 is an equidigital number, since it uses as much as digits as its factorization.

12909973 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30618, while the sum is 40.

The square root of 12909973 is about 3593.0450873876. The cubic root of 12909973 is about 234.5894325059.

The spelling of 12909973 in words is "twelve million, nine hundred nine thousand, nine hundred seventy-three".