129411742343449 has 2 divisors, whose sum is σ = 129411742343450. Its totient is φ = 129411742343448.

The previous prime is 129411742343399. The next prime is 129411742343461. The reversal of 129411742343449 is 944343247114921.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90757631822400 + 38654110521049 = 9526680^2 + 6217243^2 .

It is an emirp because it is prime and its reverse (944343247114921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 129411742343449 - 2⁹ = 129411742342937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 129411742343393 and 129411742343402.

It is not a weakly prime, because it can be changed into another prime (129411742373449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64705871171724 + 64705871171725.

It is an arithmetic number, because the mean of its divisors is an integer number (64705871171725).

Almost surely, 2^{129411742343449} is an apocalyptic number.

It is an amenable number.

129411742343449 is a deficient number, since it is larger than the sum of its proper divisors (1).

129411742343449 is an equidigital number, since it uses as much as digits as its factorization.

129411742343449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20901888, while the sum is 58.

The spelling of 129411742343449 in words is "one hundred twenty-nine trillion, four hundred eleven billion, seven hundred forty-two million, three hundred forty-three thousand, four hundred forty-nine".