8409663 has 20 divisors (see below), whose sum is σ = 12835680. Its totient is φ = 5487156.

The previous prime is 8409637. The next prime is 8409671. The reversal of 8409663 is 3669048.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is an ABA number since it can be written as A⋅B^A, here for A=3, B=141.

It is not a de Polignac number, because 8409663 - 2¹² = 8405567 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8409613) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 178906 + ... + 178952.

It is an arithmetic number, because the mean of its divisors is an integer number (641784).

Almost surely, 2^8409663 is an apocalyptic number.

8409663 is a deficient number, since it is larger than the sum of its proper divisors (4426017).

8409663 is an frugal number, since it uses more digits than its factorization.

8409663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153 (or 50 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 8409663 is about 2899.9418959696. The cubic root of 8409663 is about 203.3571894133.

The spelling of 8409663 in words is "eight million, four hundred nine thousand, six hundred sixty-three".