96821 has 2 divisors, whose sum is σ = 96822. Its totient is φ = 96820.

The previous prime is 96799. The next prime is 96823. The reversal of 96821 is 12869.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96721 + 100 = 311^2 + 10^2 .

It is a cyclic number.

It is not a de Polignac number, because 96821 - 2⁶ = 96757 is a prime.

Together with 96823, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (96823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48410 + 48411.

It is an arithmetic number, because the mean of its divisors is an integer number (48411).

2⁹⁶⁸²¹ is an apocalyptic number.

It is an amenable number.

96821 is a deficient number, since it is larger than the sum of its proper divisors (1).

96821 is an equidigital number, since it uses as much as digits as its factorization.

96821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 864, while the sum is 26.

The square root of 96821 is about 311.1607301701. The cubic root of 96821 is about 45.9187285824.

It can be divided in two parts, 968 and 21, that added together give a palindrome (989).

The spelling of 96821 in words is "ninety-six thousand, eight hundred twenty-one".