8520443 has 4 divisors (see below), whose sum is σ = 8795328. Its totient is φ = 8245560.

The previous prime is 8520437. The next prime is 8520481. The reversal of 8520443 is 3440258.

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

It is a cyclic number.

It is not a de Polignac number, because 8520443 - 2⁴ = 8520427 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8520433) 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, 137396 + ... + 137457.

It is an arithmetic number, because the mean of its divisors is an integer number (2198832).

Almost surely, 2^8520443 is an apocalyptic number.

8520443 is a deficient number, since it is larger than the sum of its proper divisors (274885).

8520443 is a wasteful number, since it uses less digits than its factorization.

8520443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274884.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 8520443 is about 2918.9797875285. The cubic root of 8520443 is about 204.2462344503.

The spelling of 8520443 in words is "eight million, five hundred twenty thousand, four hundred forty-three".