863442847 has 2 divisors, whose sum is σ = 863442848. Its totient is φ = 863442846.

The previous prime is 863442829. The next prime is 863442871. The reversal of 863442847 is 748244368.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-863442847 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 863442797 and 863442806.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (863442817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 431721423 + 431721424.

It is an arithmetic number, because the mean of its divisors is an integer number (431721424).

Almost surely, 2^863442847 is an apocalyptic number.

863442847 is a deficient number, since it is larger than the sum of its proper divisors (1).

863442847 is an equidigital number, since it uses as much as digits as its factorization.

863442847 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1032192, while the sum is 46.

The square root of 863442847 is about 29384.3980200378. The cubic root of 863442847 is about 952.2358590896.

The spelling of 863442847 in words is "eight hundred sixty-three million, four hundred forty-two thousand, eight hundred forty-seven".