43473643 has 4 divisors (see below), whose sum is σ = 43493920. Its totient is φ = 43453368.

The previous prime is 43473601. The next prime is 43473649. The reversal of 43473643 is 34637434.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43473643 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 43473599 and 43473608.

It is not an unprimeable number, because it can be changed into a prime (43473649) 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, 6483 + ... + 11356.

It is an arithmetic number, because the mean of its divisors is an integer number (10873480).

Almost surely, 2^43473643 is an apocalyptic number.

43473643 is a deficient number, since it is larger than the sum of its proper divisors (20277).

43473643 is a wasteful number, since it uses less digits than its factorization.

43473643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20276.

The product of its digits is 72576, while the sum is 34.

The square root of 43473643 is about 6593.4545573622. The cubic root of 43473643 is about 351.6214373473.

The spelling of 43473643 in words is "forty-three million, four hundred seventy-three thousand, six hundred forty-three".