847949 has 2 divisors, whose sum is σ = 847950. Its totient is φ = 847948.

The previous prime is 847937. The next prime is 847967. The reversal of 847949 is 949748.

847949 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 499849 + 348100 = 707^2 + 590^2 .

It is a cyclic number.

It is not a de Polignac number, because 847949 - 2⁴ = 847933 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 847949.

It is not a weakly prime, because it can be changed into another prime (847919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 423974 + 423975.

It is an arithmetic number, because the mean of its divisors is an integer number (423975).

2⁸⁴⁷⁹⁴⁹ is an apocalyptic number.

It is an amenable number.

847949 is a deficient number, since it is larger than the sum of its proper divisors (1).

847949 is an equidigital number, since it uses as much as digits as its factorization.

847949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 41.

The square root of 847949 is about 920.8414630109. The cubic root of 847949 is about 94.6505722711.

The spelling of 847949 in words is "eight hundred forty-seven thousand, nine hundred forty-nine".