4863821 has 2 divisors, whose sum is σ = 4863822. Its totient is φ = 4863820.

The previous prime is 4863809. The next prime is 4863823. The reversal of 4863821 is 1283684.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4818025 + 45796 = 2195^2 + 214^2 .

It is a cyclic number.

It is not a de Polignac number, because 4863821 - 2¹⁰ = 4862797 is a prime.

Together with 4863823, 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 (4863823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2431910 + 2431911.

It is an arithmetic number, because the mean of its divisors is an integer number (2431911).

Almost surely, 2^4863821 is an apocalyptic number.

It is an amenable number.

4863821 is a deficient number, since it is larger than the sum of its proper divisors (1).

4863821 is an equidigital number, since it uses as much as digits as its factorization.

4863821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9216, while the sum is 32.

The square root of 4863821 is about 2205.4072186333. The cubic root of 4863821 is about 169.4308649115.

The spelling of 4863821 in words is "four million, eight hundred sixty-three thousand, eight hundred twenty-one".