12222989 has 2 divisors, whose sum is σ = 12222990. Its totient is φ = 12222988.

The previous prime is 12222979. The next prime is 12223009. The reversal of 12222989 is 98922221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11957764 + 265225 = 3458^2 + 515^2 .

It is a cyclic number.

It is not a de Polignac number, because 12222989 - 2⁸ = 12222733 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12222979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6111494 + 6111495.

It is an arithmetic number, because the mean of its divisors is an integer number (6111495).

Almost surely, 2^12222989 is an apocalyptic number.

It is an amenable number.

12222989 is a deficient number, since it is larger than the sum of its proper divisors (1).

12222989 is an equidigital number, since it uses as much as digits as its factorization.

12222989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 35.

The square root of 12222989 is about 3496.1391562694. The cubic root of 12222989 is about 230.3522579532.

The spelling of 12222989 in words is "twelve million, two hundred twenty-two thousand, nine hundred eighty-nine".