84247 has 2 divisors, whose sum is σ = 84248. Its totient is φ = 84246.

The previous prime is 84239. The next prime is 84263. The reversal of 84247 is 74248.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 84247 - 2³ = 84239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42123 + 42124.

It is an arithmetic number, because the mean of its divisors is an integer number (42124).

2⁸⁴²⁴⁷ is an apocalyptic number.

84247 is a deficient number, since it is larger than the sum of its proper divisors (1).

84247 is an equidigital number, since it uses as much as digits as its factorization.

84247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1792, while the sum is 25.

The square root of 84247 is about 290.2533376208. The cubic root of 84247 is about 43.8380756321.

Subtracting from 84247 its reverse (74248), we obtain a palindrome (9999).

The spelling of 84247 in words is "eighty-four thousand, two hundred forty-seven".