84947 has 2 divisors, whose sum is σ = 84948. Its totient is φ = 84946.

The previous prime is 84919. The next prime is 84961. The reversal of 84947 is 74948.

Added to its reverse (74948) it gives a triangular number (159895 = T₅₆₅).

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 84947 - 2⁸ = 84691 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 84947.

It is not a weakly prime, because it can be changed into another prime (84967) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42473 + 42474.

It is an arithmetic number, because the mean of its divisors is an integer number (42474).

2⁸⁴⁹⁴⁷ is an apocalyptic number.

84947 is a deficient number, since it is larger than the sum of its proper divisors (1).

84947 is an equidigital number, since it uses as much as digits as its factorization.

84947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 32.

The square root of 84947 is about 291.4566863189. The cubic root of 84947 is about 43.9591563128.

Adding to 84947 its reverse (74948), we get a triangular number (159895 = T₅₆₅).

Subtracting from 84947 its reverse (74948), we obtain a palindrome (9999).

It can be divided in two parts, 849 and 47, that multiplied together give a triangular number (39903 = T₂₈₂).

The spelling of 84947 in words is "eighty-four thousand, nine hundred forty-seven".