129629513 has 4 divisors (see below), whose sum is σ = 139601028. Its totient is φ = 119658000.

The previous prime is 129629503. The next prime is 129629519. The reversal of 129629513 is 315926921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 315926921 = 31 ⋅10191191.

It can be written as a sum of positive squares in 2 ways, for example, as 62520649 + 67108864 = 7907^2 + 8192^2 .

It is a cyclic number.

It is not a de Polignac number, because 129629513 - 2¹⁰ = 129628489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129629519) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4985738 + ... + 4985763.

It is an arithmetic number, because the mean of its divisors is an integer number (34900257).

Almost surely, 2^129629513 is an apocalyptic number.

129629513 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

129629513 is a deficient number, since it is larger than the sum of its proper divisors (9971515).

129629513 is an equidigital number, since it uses as much as digits as its factorization.

129629513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9971514.

The product of its digits is 29160, while the sum is 38.

The square root of 129629513 is about 11385.4957292162. The cubic root of 129629513 is about 506.0980101980.

The spelling of 129629513 in words is "one hundred twenty-nine million, six hundred twenty-nine thousand, five hundred thirteen".