12345432109 has 2 divisors, whose sum is σ = 12345432110. Its totient is φ = 12345432108.

The previous prime is 12345432097. The next prime is 12345432133. The reversal of 12345432109 is 90123454321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12345432100 + 9 = 111110^2 + 3^2 .

It is a cyclic number.

It is not a de Polignac number, because 12345432109 - 2¹¹ = 12345430061 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12345432149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6172716054 + 6172716055.

It is an arithmetic number, because the mean of its divisors is an integer number (6172716055).

Almost surely, 2^12345432109 is an apocalyptic number.

It is an amenable number.

12345432109 is a deficient number, since it is larger than the sum of its proper divisors (1).

12345432109 is an equidigital number, since it uses as much as digits as its factorization.

12345432109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 34.

The spelling of 12345432109 in words is "twelve billion, three hundred forty-five million, four hundred thirty-two thousand, one hundred nine".