12223987 has 2 divisors, whose sum is σ = 12223988. Its totient is φ = 12223986.

The previous prime is 12223979. The next prime is 12224021. The reversal of 12223987 is 78932221.

It is an a-pointer prime, because the next prime (12224021) can be obtained adding 12223987 to its sum of digits (34).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12223987 - 2³ = 12223979 is a prime.

It is not a weakly prime, because it can be changed into another prime (12223927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6111993 + 6111994.

It is an arithmetic number, because the mean of its divisors is an integer number (6111994).

Almost surely, 2^12223987 is an apocalyptic number.

12223987 is a deficient number, since it is larger than the sum of its proper divisors (1).

12223987 is an equidigital number, since it uses as much as digits as its factorization.

12223987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 34.

The square root of 12223987 is about 3496.2818822286. The cubic root of 12223987 is about 230.3585271589.

The spelling of 12223987 in words is "twelve million, two hundred twenty-three thousand, nine hundred eighty-seven".