129685313 has 6 divisors (see below), whose sum is σ = 130992342. Its totient is φ = 128391200.

The previous prime is 129685289. The next prime is 129685331. The reversal of 129685313 is 313586921.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 117245584 + 12439729 = 10828^2 + 3527^2 .

It is not a de Polignac number, because 129685313 - 2¹² = 129681217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129682313) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3845 + ... + 16557.

It is an arithmetic number, because the mean of its divisors is an integer number (21832057).

Almost surely, 2^129685313 is an apocalyptic number.

It is an amenable number.

129685313 is a deficient number, since it is larger than the sum of its proper divisors (1307029).

129685313 is an equidigital number, since it uses as much as digits as its factorization.

129685313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12915 (or 12814 counting only the distinct ones).

The product of its digits is 38880, while the sum is 38.

The square root of 129685313 is about 11387.9459517509. The cubic root of 129685313 is about 506.1706176807.

It can be divided in two parts, 12968 and 5313, that added together give a palindrome (18281).

The spelling of 129685313 in words is "one hundred twenty-nine million, six hundred eighty-five thousand, three hundred thirteen".