4772821 has 2 divisors, whose sum is σ = 4772822. Its totient is φ = 4772820.

The previous prime is 4772797. The next prime is 4772837. The reversal of 4772821 is 1282774.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2480625 + 2292196 = 1575^2 + 1514^2 .

It is a cyclic number.

It is not a de Polignac number, because 4772821 - 2⁹ = 4772309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4772861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2386410 + 2386411.

It is an arithmetic number, because the mean of its divisors is an integer number (2386411).

Almost surely, 2^4772821 is an apocalyptic number.

It is an amenable number.

4772821 is a deficient number, since it is larger than the sum of its proper divisors (1).

4772821 is an equidigital number, since it uses as much as digits as its factorization.

4772821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6272, while the sum is 31.

The square root of 4772821 is about 2184.6786949115. The cubic root of 4772821 is about 168.3675461181.

The spelling of 4772821 in words is "four million, seven hundred seventy-two thousand, eight hundred twenty-one".