847949867 has 2 divisors, whose sum is σ = 847949868. Its totient is φ = 847949866.

The previous prime is 847949863. The next prime is 847949873. The reversal of 847949867 is 768949748.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 847949867 - 2² = 847949863 is a prime.

It is not a weakly prime, because it can be changed into another prime (847949863) 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, 423974933 + 423974934.

It is an arithmetic number, because the mean of its divisors is an integer number (423974934).

Almost surely, 2^847949867 is an apocalyptic number.

847949867 is a deficient number, since it is larger than the sum of its proper divisors (1).

847949867 is an equidigital number, since it uses as much as digits as its factorization.

847949867 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24385536, while the sum is 62.

The square root of 847949867 is about 29119.5787572554. The cubic root of 847949867 is about 946.5060453011.

The spelling of 847949867 in words is "eight hundred forty-seven million, nine hundred forty-nine thousand, eight hundred sixty-seven".