12440322989 has 2 divisors, whose sum is σ = 12440322990. Its totient is φ = 12440322988.

The previous prime is 12440322977. The next prime is 12440323057. The reversal of 12440322989 is 98922304421.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7117453225 + 5322869764 = 84365^2 + 72958^2 .

It is a cyclic number.

It is not a de Polignac number, because 12440322989 - 2²⁴ = 12423545773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12440321989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6220161494 + 6220161495.

It is an arithmetic number, because the mean of its divisors is an integer number (6220161495).

Almost surely, 2^12440322989 is an apocalyptic number.

It is an amenable number.

12440322989 is a deficient number, since it is larger than the sum of its proper divisors (1).

12440322989 is an equidigital number, since it uses as much as digits as its factorization.

12440322989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 248832, while the sum is 44.

The spelling of 12440322989 in words is "twelve billion, four hundred forty million, three hundred twenty-two thousand, nine hundred eighty-nine".