43423897 has 4 divisors (see below), whose sum is σ = 47371536. Its totient is φ = 39476260.

The previous prime is 43423883. The next prime is 43423909. The reversal of 43423897 is 79832434.

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 43423897 - 2⁷ = 43423769 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43423837) 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, 1973803 + ... + 1973824.

It is an arithmetic number, because the mean of its divisors is an integer number (11842884).

Almost surely, 2^43423897 is an apocalyptic number.

It is an amenable number.

43423897 is a deficient number, since it is larger than the sum of its proper divisors (3947639).

43423897 is a wasteful number, since it uses less digits than its factorization.

43423897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3947638.

The product of its digits is 145152, while the sum is 40.

The square root of 43423897 is about 6589.6811000230. The cubic root of 43423897 is about 351.4872684204.

The spelling of 43423897 in words is "forty-three million, four hundred twenty-three thousand, eight hundred ninety-seven".