129587929 has 2 divisors, whose sum is σ = 129587930. Its totient is φ = 129587928.

The previous prime is 129587917. The next prime is 129587981. The reversal of 129587929 is 929785921.

It is an a-pointer prime, because the next prime (129587981) can be obtained adding 129587929 to its sum of digits (52).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 91642329 + 37945600 = 9573^2 + 6160^2 .

It is an emirp because it is prime and its reverse (929785921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 129587929 - 2⁵ = 129587897 is a prime.

It is not a weakly prime, because it can be changed into another prime (129587989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64793964 + 64793965.

It is an arithmetic number, because the mean of its divisors is an integer number (64793965).

Almost surely, 2^129587929 is an apocalyptic number.

It is an amenable number.

129587929 is a deficient number, since it is larger than the sum of its proper divisors (1).

129587929 is an equidigital number, since it uses as much as digits as its factorization.

129587929 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 816480, while the sum is 52.

The square root of 129587929 is about 11383.6693996268. The cubic root of 129587929 is about 506.0438871567.

The spelling of 129587929 in words is "one hundred twenty-nine million, five hundred eighty-seven thousand, nine hundred twenty-nine".