12940223 has 2 divisors, whose sum is σ = 12940224. Its totient is φ = 12940222.

The previous prime is 12940219. The next prime is 12940229. The reversal of 12940223 is 32204921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12940223 - 2² = 12940219 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12940229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6470111 + 6470112.

It is an arithmetic number, because the mean of its divisors is an integer number (6470112).

Almost surely, 2^12940223 is an apocalyptic number.

12940223 is a deficient number, since it is larger than the sum of its proper divisors (1).

12940223 is an equidigital number, since it uses as much as digits as its factorization.

12940223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 12940223 is about 3597.2521457357. The cubic root of 12940223 is about 234.7725156399.

The spelling of 12940223 in words is "twelve million, nine hundred forty thousand, two hundred twenty-three".