129943345 has 24 divisors (see below), whose sum is σ = 187655400. Its totient is φ = 86026752.

The previous prime is 129943343. The next prime is 129943349. The reversal of 129943345 is 543349921.

It can be written as a sum of positive squares in 4 ways, for example, as 49787136 + 80156209 = 7056^2 + 8953^2 .

It is not a de Polignac number, because 129943345 - 2¹ = 129943343 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 129943298 and 129943307.

It is not an unprimeable number, because it can be changed into a prime (129943343) 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 in 23 ways as a sum of consecutive naturals, for example, 2040 + ... + 16249.

It is an arithmetic number, because the mean of its divisors is an integer number (7818975).

Almost surely, 2^129943345 is an apocalyptic number.

It is an amenable number.

129943345 is a deficient number, since it is larger than the sum of its proper divisors (57712055).

129943345 is a wasteful number, since it uses less digits than its factorization.

129943345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18337 (or 18330 counting only the distinct ones).

The product of its digits is 116640, while the sum is 40.

The square root of 129943345 is about 11399.2694941386. The cubic root of 129943345 is about 506.5061007735.

It can be divided in two parts, 1299 and 43345, that added together give a palindrome (44644).

The spelling of 129943345 in words is "one hundred twenty-nine million, nine hundred forty-three thousand, three hundred forty-five".