4294967821 has 2 divisors, whose sum is σ = 4294967822. Its totient is φ = 4294967820.

The previous prime is 4294967797. The next prime is 4294967857. The reversal of 4294967821 is 1287694924.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3867098596 + 427869225 = 62186^2 + 20685^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4294967821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4294967861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2147483910 + 2147483911.

It is an arithmetic number, because the mean of its divisors is an integer number (2147483911).

Almost surely, 2^4294967821 is an apocalyptic number.

It is an amenable number.

4294967821 is a deficient number, since it is larger than the sum of its proper divisors (1).

4294967821 is an equidigital number, since it uses as much as digits as its factorization.

4294967821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1741824, while the sum is 52.

The square root of 4294967821 is about 65536.0040054320. The cubic root of 4294967821 is about 1625.4987434470.

The spelling of 4294967821 in words is "four billion, two hundred ninety-four million, nine hundred sixty-seven thousand, eight hundred twenty-one".