847213 has 2 divisors, whose sum is σ = 847214. Its totient is φ = 847212.

The previous prime is 847201. The next prime is 847219. The reversal of 847213 is 312748.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 842724 + 4489 = 918^2 + 67^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-847213 is a prime.

It is equal to p₆₇₄₁₇ and since 847213 and 67417 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (847219) 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, 423606 + 423607.

It is an arithmetic number, because the mean of its divisors is an integer number (423607).

2⁸⁴⁷²¹³ is an apocalyptic number.

It is an amenable number.

847213 is a deficient number, since it is larger than the sum of its proper divisors (1).

847213 is an equidigital number, since it uses as much as digits as its factorization.

847213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1344, while the sum is 25.

The square root of 847213 is about 920.4417417740. The cubic root of 847213 is about 94.6231795127.

The spelling of 847213 in words is "eight hundred forty-seven thousand, two hundred thirteen".