8487643 has 4 divisors (see below), whose sum is σ = 8535240. Its totient is φ = 8440048.

The previous prime is 8487631. The next prime is 8487649. The reversal of 8487643 is 3467848.

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-8487643 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8487596 and 8487605.

It is not an unprimeable number, because it can be changed into a prime (8487649) 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, 23530 + ... + 23887.

It is an arithmetic number, because the mean of its divisors is an integer number (2133810).

Almost surely, 2^8487643 is an apocalyptic number.

8487643 is a deficient number, since it is larger than the sum of its proper divisors (47597).

8487643 is a wasteful number, since it uses less digits than its factorization.

8487643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47596.

The product of its digits is 129024, while the sum is 40.

The square root of 8487643 is about 2913.3559686382. The cubic root of 8487643 is about 203.9838110311.

The spelling of 8487643 in words is "eight million, four hundred eighty-seven thousand, six hundred forty-three".