4719821 has 2 divisors, whose sum is σ = 4719822. Its totient is φ = 4719820.

The previous prime is 4719811. The next prime is 4719839. The reversal of 4719821 is 1289174.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3422500 + 1297321 = 1850^2 + 1139^2 .

It is a cyclic number.

It is not a de Polignac number, because 4719821 - 2¹⁴ = 4703437 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4719811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2359910 + 2359911.

It is an arithmetic number, because the mean of its divisors is an integer number (2359911).

Almost surely, 2^4719821 is an apocalyptic number.

It is an amenable number.

4719821 is a deficient number, since it is larger than the sum of its proper divisors (1).

4719821 is an equidigital number, since it uses as much as digits as its factorization.

4719821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 32.

The square root of 4719821 is about 2172.5149021353. The cubic root of 4719821 is about 167.7420100094.

The spelling of 4719821 in words is "four million, seven hundred nineteen thousand, eight hundred twenty-one".