43613389 has 4 divisors (see below), whose sum is σ = 43739424. Its totient is φ = 43487356.

The previous prime is 43613387. The next prime is 43613399. The reversal of 43613389 is 98331634.

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 cyclic number.

It is not a de Polignac number, because 43613389 - 2¹ = 43613387 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 (43613387) 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, 62497 + ... + 63190.

It is an arithmetic number, because the mean of its divisors is an integer number (10934856).

Almost surely, 2^43613389 is an apocalyptic number.

It is an amenable number.

43613389 is a deficient number, since it is larger than the sum of its proper divisors (126035).

43613389 is a wasteful number, since it uses less digits than its factorization.

43613389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126034.

The product of its digits is 46656, while the sum is 37.

The square root of 43613389 is about 6604.0433826558. The cubic root of 43613389 is about 351.9977966675.

It can be divided in two parts, 4361 and 3389, that added together give a triangular number (7750 = T₁₂₄).

The spelling of 43613389 in words is "forty-three million, six hundred thirteen thousand, three hundred eighty-nine".