8636641 has 4 divisors (see below), whose sum is σ = 9301012. Its totient is φ = 7972272.

The previous prime is 8636633. The next prime is 8636647. The reversal of 8636641 is 1466368.

8636641 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 819025 + 7817616 = 905^2 + 2796^2 .

It is a cyclic number.

It is not a de Polignac number, because 8636641 - 2³ = 8636633 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8636597 and 8636606.

It is not an unprimeable number, because it can be changed into a prime (8636647) 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, 332166 + ... + 332191.

It is an arithmetic number, because the mean of its divisors is an integer number (2325253).

Almost surely, 2^8636641 is an apocalyptic number.

It is an amenable number.

8636641 is a deficient number, since it is larger than the sum of its proper divisors (664371).

8636641 is a wasteful number, since it uses less digits than its factorization.

8636641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664370.

The product of its digits is 20736, while the sum is 34.

The square root of 8636641 is about 2938.8162582918. The cubic root of 8636641 is about 205.1705184451.

The spelling of 8636641 in words is "eight million, six hundred thirty-six thousand, six hundred forty-one".