43129313 has 4 divisors (see below), whose sum is σ = 43404180. Its totient is φ = 42854448.

The previous prime is 43129291. The next prime is 43129321. The reversal of 43129313 is 31392134.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15745024 + 27384289 = 3968^2 + 5233^2 .

It is a cyclic number.

It is not a de Polignac number, because 43129313 - 2⁶ = 43129249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43129363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137198 + ... + 137511.

It is an arithmetic number, because the mean of its divisors is an integer number (10851045).

Almost surely, 2^43129313 is an apocalyptic number.

It is an amenable number.

43129313 is a deficient number, since it is larger than the sum of its proper divisors (274867).

43129313 is a wasteful number, since it uses less digits than its factorization.

43129313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274866.

The product of its digits is 1944, while the sum is 26.

The square root of 43129313 is about 6567.2911462794. The cubic root of 43129313 is about 350.6906444390.

The spelling of 43129313 in words is "forty-three million, one hundred twenty-nine thousand, three hundred thirteen".