43420073 has 4 divisors (see below), whose sum is σ = 45705360. Its totient is φ = 41134788.

The previous prime is 43420063. The next prime is 43420079. The reversal of 43420073 is 37002434.

It is a happy number.

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 43420073 - 2¹⁰ = 43419049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43420079) 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, 1142615 + ... + 1142652.

It is an arithmetic number, because the mean of its divisors is an integer number (11426340).

Almost surely, 2^43420073 is an apocalyptic number.

It is an amenable number.

43420073 is a deficient number, since it is larger than the sum of its proper divisors (2285287).

43420073 is a wasteful number, since it uses less digits than its factorization.

43420073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2285286.

The product of its (nonzero) digits is 2016, while the sum is 23.

The square root of 43420073 is about 6589.3909430235. The cubic root of 43420073 is about 351.4769505473.

The spelling of 43420073 in words is "forty-three million, four hundred twenty thousand, seventy-three".