847993 has 2 divisors, whose sum is σ = 847994. Its totient is φ = 847992.

The previous prime is 847991. The next prime is 847997. The reversal of 847993 is 399748.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 685584 + 162409 = 828^2 + 403^2 .

It is a cyclic number.

It is not a de Polignac number, because 847993 - 2¹ = 847991 is a prime.

Together with 847991, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (847991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 423996 + 423997.

It is an arithmetic number, because the mean of its divisors is an integer number (423997).

2⁸⁴⁷⁹⁹³ is an apocalyptic number.

It is an amenable number.

847993 is a deficient number, since it is larger than the sum of its proper divisors (1).

847993 is an equidigital number, since it uses as much as digits as its factorization.

847993 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 40.

The square root of 847993 is about 920.8653538927. The cubic root of 847993 is about 94.6522093794.

The spelling of 847993 in words is "eight hundred forty-seven thousand, nine hundred ninety-three".