43039423 has 4 divisors (see below), whose sum is σ = 49187920. Its totient is φ = 36890928.

The previous prime is 43039387. The next prime is 43039457. The reversal of 43039423 is 32493034.

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 43039423 - 2¹⁷ = 42908351 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 43039391 and 43039400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43039483) 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, 3074238 + ... + 3074251.

It is an arithmetic number, because the mean of its divisors is an integer number (12296980).

Almost surely, 2^43039423 is an apocalyptic number.

43039423 is a deficient number, since it is larger than the sum of its proper divisors (6148497).

43039423 is an equidigital number, since it uses as much as digits as its factorization.

43039423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6148496.

The product of its (nonzero) digits is 7776, while the sum is 28.

The square root of 43039423 is about 6560.4438112067. The cubic root of 43039423 is about 350.4468388098.

The spelling of 43039423 in words is "forty-three million, thirty-nine thousand, four hundred twenty-three".