43423861 has 4 divisors (see below), whose sum is σ = 46764172. Its totient is φ = 40083552.

The previous prime is 43423837. The next prime is 43423867. The reversal of 43423861 is 16832434.

43423861 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 can be written as a sum of positive squares in 2 ways, for example, as 15132100 + 28291761 = 3890^2 + 5319^2 .

It is a cyclic number.

It is not a de Polignac number, because 43423861 - 2⁷ = 43423733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43423867) 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, 1670136 + ... + 1670161.

It is an arithmetic number, because the mean of its divisors is an integer number (11691043).

Almost surely, 2^43423861 is an apocalyptic number.

It is an amenable number.

43423861 is a deficient number, since it is larger than the sum of its proper divisors (3340311).

43423861 is a wasteful number, since it uses less digits than its factorization.

43423861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3340310.

The product of its digits is 13824, while the sum is 31.

The square root of 43423861 is about 6589.6783684790. The cubic root of 43423861 is about 351.4871712884.

The spelling of 43423861 in words is "forty-three million, four hundred twenty-three thousand, eight hundred sixty-one".