129953489 has 2 divisors, whose sum is σ = 129953490. Its totient is φ = 129953488.

The previous prime is 129953429. The next prime is 129953513. The reversal of 129953489 is 984359921.

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., 116812864 + 13140625 = 10808^2 + 3625^2 .

It is a cyclic number.

It is not a de Polignac number, because 129953489 - 2⁸ = 129953233 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (129953419) 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, 64976744 + 64976745.

It is an arithmetic number, because the mean of its divisors is an integer number (64976745).

Almost surely, 2^129953489 is an apocalyptic number.

It is an amenable number.

129953489 is a deficient number, since it is larger than the sum of its proper divisors (1).

129953489 is an equidigital number, since it uses as much as digits as its factorization.

129953489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 699840, while the sum is 50.

The square root of 129953489 is about 11399.7144262477. The cubic root of 129953489 is about 506.5192805280.

The spelling of 129953489 in words is "one hundred twenty-nine million, nine hundred fifty-three thousand, four hundred eighty-nine".