842804647 has 2 divisors, whose sum is σ = 842804648. Its totient is φ = 842804646.

The previous prime is 842804629. The next prime is 842804681. The reversal of 842804647 is 746408248.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 842804647 - 2¹⁵ = 842771879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (842808647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 421402323 + 421402324.

It is an arithmetic number, because the mean of its divisors is an integer number (421402324).

Almost surely, 2^842804647 is an apocalyptic number.

842804647 is a deficient number, since it is larger than the sum of its proper divisors (1).

842804647 is an equidigital number, since it uses as much as digits as its factorization.

842804647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 344064, while the sum is 43.

The square root of 842804647 is about 29031.0979296340. The cubic root of 842804647 is about 944.5877458645.

The spelling of 842804647 in words is "eight hundred forty-two million, eight hundred four thousand, six hundred forty-seven".