43129389 has 4 divisors (see below), whose sum is σ = 57505856. Its totient is φ = 28752924.

The previous prime is 43129367. The next prime is 43129397. The reversal of 43129389 is 98392134.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a de Polignac number, because none of the positive numbers 2^k-43129389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43129189) 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, 7188229 + ... + 7188234.

It is an arithmetic number, because the mean of its divisors is an integer number (14376464).

Almost surely, 2^43129389 is an apocalyptic number.

It is an amenable number.

43129389 is a deficient number, since it is larger than the sum of its proper divisors (14376467).

43129389 is a wasteful number, since it uses less digits than its factorization.

43129389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14376466.

The product of its digits is 46656, while the sum is 39.

The square root of 43129389 is about 6567.2969325286. The cubic root of 43129389 is about 350.6908504279.

The spelling of 43129389 in words is "forty-three million, one hundred twenty-nine thousand, three hundred eighty-nine".