8642939 has 2 divisors, whose sum is σ = 8642940. Its totient is φ = 8642938.

The previous prime is 8642927. The next prime is 8642947. The reversal of 8642939 is 9392468.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8642939 - 2¹² = 8638843 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8642896 and 8642905.

It is not a weakly prime, because it can be changed into another prime (8642989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4321469 + 4321470.

It is an arithmetic number, because the mean of its divisors is an integer number (4321470).

Almost surely, 2^8642939 is an apocalyptic number.

8642939 is a deficient number, since it is larger than the sum of its proper divisors (1).

8642939 is an equidigital number, since it uses as much as digits as its factorization.

8642939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 93312, while the sum is 41.

The square root of 8642939 is about 2939.8875828848. The cubic root of 8642939 is about 205.2203777196.

It can be divided in two parts, 86429 and 39, that added together give a palindrome (86468).

The spelling of 8642939 in words is "eight million, six hundred forty-two thousand, nine hundred thirty-nine".