129529913 has 2 divisors, whose sum is σ = 129529914. Its totient is φ = 129529912.

The previous prime is 129529879. The next prime is 129529931. The reversal of 129529913 is 319925921.

Together with next prime (129529931) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 113784889 + 15745024 = 10667^2 + 3968^2 .

It is a cyclic number.

It is not a de Polignac number, because 129529913 - 2⁶ = 129529849 is a prime.

It is not a weakly prime, because it can be changed into another prime (129529963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64764956 + 64764957.

It is an arithmetic number, because the mean of its divisors is an integer number (64764957).

Almost surely, 2^129529913 is an apocalyptic number.

It is an amenable number.

129529913 is a deficient number, since it is larger than the sum of its proper divisors (1).

129529913 is an equidigital number, since it uses as much as digits as its factorization.

129529913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43740, while the sum is 41.

The square root of 129529913 is about 11381.1209026176. The cubic root of 129529913 is about 505.9683579395.

The spelling of 129529913 in words is "one hundred twenty-nine million, five hundred twenty-nine thousand, nine hundred thirteen".