43194139 has 4 divisors (see below), whose sum is σ = 43316856. Its totient is φ = 43071424.

The previous prime is 43194131. The next prime is 43194149. The reversal of 43194139 is 93149134.

43194139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 43194139 - 2³ = 43194131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43194131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60829 + ... + 61534.

It is an arithmetic number, because the mean of its divisors is an integer number (10829214).

Almost surely, 2^43194139 is an apocalyptic number.

43194139 is a deficient number, since it is larger than the sum of its proper divisors (122717).

43194139 is a wasteful number, since it uses less digits than its factorization.

43194139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122716.

The product of its digits is 11664, while the sum is 34.

The square root of 43194139 is about 6572.2248135620. The cubic root of 43194139 is about 350.8662596568.

The spelling of 43194139 in words is "forty-three million, one hundred ninety-four thousand, one hundred thirty-nine".