129461173889 has 2 divisors, whose sum is σ = 129461173890. Its totient is φ = 129461173888.

The previous prime is 129461173883. The next prime is 129461173913. The reversal of 129461173889 is 988371164921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116240083600 + 13221090289 = 340940^2 + 114983^2 .

It is a cyclic number.

It is not a de Polignac number, because 129461173889 - 2³² = 125166206593 is a prime.

It is not a weakly prime, because it can be changed into another prime (129461173883) 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, 64730586944 + 64730586945.

It is an arithmetic number, because the mean of its divisors is an integer number (64730586945).

Almost surely, 2^129461173889 is an apocalyptic number.

It is an amenable number.

129461173889 is a deficient number, since it is larger than the sum of its proper divisors (1).

129461173889 is an equidigital number, since it uses as much as digits as its factorization.

129461173889 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5225472, while the sum is 59.

The spelling of 129461173889 in words is "one hundred twenty-nine billion, four hundred sixty-one million, one hundred seventy-three thousand, eight hundred eighty-nine".