8642943 has 10 divisors (see below), whose sum is σ = 12911184. Its totient is φ = 5761908.

The previous prime is 8642939. The next prime is 8642947. The reversal of 8642943 is 3492468.

It is a happy number.

8642943 is a `hidden beast` number, since 8 + 642 + 9 + 4 + 3 = 666.

It is an interprime number because it is at equal distance from previous prime (8642939) and next prime (8642947).

It is not a de Polignac number, because 8642943 - 2² = 8642939 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8642898 and 8642907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8642947) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 53271 + ... + 53432.

Almost surely, 2^8642943 is an apocalyptic number.

8642943 is a deficient number, since it is larger than the sum of its proper divisors (4268241).

8642943 is a wasteful number, since it uses less digits than its factorization.

8642943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106715 (or 106706 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 8642943 is about 2939.8882631828. Note that the first 3 decimals coincide. The cubic root of 8642943 is about 205.2204093786.

The spelling of 8642943 in words is "eight million, six hundred forty-two thousand, nine hundred forty-three".