12918923 has 2 divisors, whose sum is σ = 12918924. Its totient is φ = 12918922.

The previous prime is 12918911. The next prime is 12918931. The reversal of 12918923 is 32981921.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12918923 - 2⁴ = 12918907 is a prime.

It is not a weakly prime, because it can be changed into another prime (12918943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6459461 + 6459462.

It is an arithmetic number, because the mean of its divisors is an integer number (6459462).

Almost surely, 2^12918923 is an apocalyptic number.

12918923 is a deficient number, since it is larger than the sum of its proper divisors (1).

12918923 is an equidigital number, since it uses as much as digits as its factorization.

12918923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 35.

The square root of 12918923 is about 3594.2903332925. The cubic root of 12918923 is about 234.6436306678.

The spelling of 12918923 in words is "twelve million, nine hundred eighteen thousand, nine hundred twenty-three".