863478947 has 2 divisors, whose sum is σ = 863478948. Its totient is φ = 863478946.

The previous prime is 863478923. The next prime is 863479007. The reversal of 863478947 is 749874368.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 863478947 - 2¹² = 863474851 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 863478892 and 863478901.

It is not a weakly prime, because it can be changed into another prime (863478907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 431739473 + 431739474.

It is an arithmetic number, because the mean of its divisors is an integer number (431739474).

Almost surely, 2^863478947 is an apocalyptic number.

863478947 is a deficient number, since it is larger than the sum of its proper divisors (1).

863478947 is an equidigital number, since it uses as much as digits as its factorization.

863478947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8128512, while the sum is 56.

The square root of 863478947 is about 29385.0122851769. The cubic root of 863478947 is about 952.2491296979.

The spelling of 863478947 in words is "eight hundred sixty-three million, four hundred seventy-eight thousand, nine hundred forty-seven".