8406563 has 4 divisors (see below), whose sum is σ = 9170808. Its totient is φ = 7642320.

The previous prime is 8406553. The next prime is 8406577. The reversal of 8406563 is 3656048.

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 8406563 - 2⁴ = 8406547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8406553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 382106 + ... + 382127.

It is an arithmetic number, because the mean of its divisors is an integer number (2292702).

Almost surely, 2^8406563 is an apocalyptic number.

8406563 is a deficient number, since it is larger than the sum of its proper divisors (764245).

8406563 is a wasteful number, since it uses less digits than its factorization.

8406563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 764244.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 8406563 is about 2899.4073532362. The cubic root of 8406563 is about 203.3321989247.

The spelling of 8406563 in words is "eight million, four hundred six thousand, five hundred sixty-three".