43138274939 has 4 divisors (see below), whose sum is σ = 44056110624. Its totient is φ = 42220439256.

The previous prime is 43138274923. The next prime is 43138274941. The reversal of 43138274939 is 93947283134.

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 43138274939 - 2⁴ = 43138274923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43138274969) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 458917772 + ... + 458917865.

It is an arithmetic number, because the mean of its divisors is an integer number (11014027656).

Almost surely, 2^43138274939 is an apocalyptic number.

43138274939 is a deficient number, since it is larger than the sum of its proper divisors (917835685).

43138274939 is an equidigital number, since it uses as much as digits as its factorization.

43138274939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 917835684.

The product of its digits is 3919104, while the sum is 53.

The spelling of 43138274939 in words is "forty-three billion, one hundred thirty-eight million, two hundred seventy-four thousand, nine hundred thirty-nine".