4435071821 has 2 divisors, whose sum is σ = 4435071822. Its totient is φ = 4435071820.

The previous prime is 4435071793. The next prime is 4435071869. The reversal of 4435071821 is 1281705344.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3385959721 + 1049112100 = 58189^2 + 32390^2 .

It is a cyclic number.

It is not a de Polignac number, because 4435071821 - 2¹⁰ = 4435070797 is a prime.

It is a Sophie Germain 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 (4435070821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2217535910 + 2217535911.

It is an arithmetic number, because the mean of its divisors is an integer number (2217535911).

Almost surely, 2^4435071821 is an apocalyptic number.

It is an amenable number.

4435071821 is a deficient number, since it is larger than the sum of its proper divisors (1).

4435071821 is an equidigital number, since it uses as much as digits as its factorization.

4435071821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 4435071821 is about 66596.3348916440. The cubic root of 4435071821 is about 1642.9848256521.

The spelling of 4435071821 in words is "four billion, four hundred thirty-five million, seventy-one thousand, eight hundred twenty-one".