2421823 has 2 divisors, whose sum is σ = 2421824. Its totient is φ = 2421822.

The previous prime is 2421821. The next prime is 2421841. The reversal of 2421823 is 3281242.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2421823 - 2¹ = 2421821 is a prime.

Together with 2421821, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 2421794 and 2421803.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2421821) 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, 1210911 + 1210912.

It is an arithmetic number, because the mean of its divisors is an integer number (1210912).

2^2421823 is an apocalyptic number.

2421823 is a deficient number, since it is larger than the sum of its proper divisors (1).

2421823 is an equidigital number, since it uses as much as digits as its factorization.

2421823 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 768, while the sum is 22.

The square root of 2421823 is about 1556.2207426969. The cubic root of 2421823 is about 134.2911727394.

The spelling of 2421823 in words is "two million, four hundred twenty-one thousand, eight hundred twenty-three".