4028417821 has 2 divisors, whose sum is σ = 4028417822. Its totient is φ = 4028417820.

The previous prime is 4028417747. The next prime is 4028417837. The reversal of 4028417821 is 1287148204.

It is a happy number.

4028417821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3854547225 + 173870596 = 62085^2 + 13186^2 .

It is a cyclic number.

It is not a de Polignac number, because 4028417821 - 2¹¹ = 4028415773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4028414821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2014208910 + 2014208911.

It is an arithmetic number, because the mean of its divisors is an integer number (2014208911).

Almost surely, 2^4028417821 is an apocalyptic number.

It is an amenable number.

4028417821 is a deficient number, since it is larger than the sum of its proper divisors (1).

4028417821 is an equidigital number, since it uses as much as digits as its factorization.

4028417821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28672, while the sum is 37.

The square root of 4028417821 is about 63469.8181894355. The cubic root of 4028417821 is about 1591.1513911471.

The spelling of 4028417821 in words is "four billion, twenty-eight million, four hundred seventeen thousand, eight hundred twenty-one".