4082751821 has 2 divisors, whose sum is σ = 4082751822. Its totient is φ = 4082751820.

The previous prime is 4082751817. The next prime is 4082751847. The reversal of 4082751821 is 1281572804.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3819858025 + 262893796 = 61805^2 + 16214^2 .

It is a cyclic number.

It is not a de Polignac number, because 4082751821 - 2² = 4082751817 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4082757821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2041375910 + 2041375911.

It is an arithmetic number, because the mean of its divisors is an integer number (2041375911).

Almost surely, 2^4082751821 is an apocalyptic number.

It is an amenable number.

4082751821 is a deficient number, since it is larger than the sum of its proper divisors (1).

4082751821 is an equidigital number, since it uses as much as digits as its factorization.

4082751821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 35840, while the sum is 38.

The square root of 4082751821 is about 63896.4147742266. The cubic root of 4082751821 is about 1598.2731135277.

The spelling of 4082751821 in words is "four billion, eighty-two million, seven hundred fifty-one thousand, eight hundred twenty-one".