8042647 has 2 divisors, whose sum is σ = 8042648. Its totient is φ = 8042646.

The previous prime is 8042641. The next prime is 8042659. The reversal of 8042647 is 7462408.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8042647 - 2¹⁹ = 7518359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8042641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4021323 + 4021324.

It is an arithmetic number, because the mean of its divisors is an integer number (4021324).

Almost surely, 2^8042647 is an apocalyptic number.

8042647 is a deficient number, since it is larger than the sum of its proper divisors (1).

8042647 is an equidigital number, since it uses as much as digits as its factorization.

8042647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10752, while the sum is 31.

The square root of 8042647 is about 2835.9560998013. The cubic root of 8042647 is about 200.3547620142.

The spelling of 8042647 in words is "eight million, forty-two thousand, six hundred forty-seven".