4073821861 has 2 divisors, whose sum is σ = 4073821862. Its totient is φ = 4073821860.

The previous prime is 4073821783. The next prime is 4073821931. The reversal of 4073821861 is 1681283704.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3883657761 + 190164100 = 62319^2 + 13790^2 .

It is a cyclic number.

It is not a de Polignac number, because 4073821861 - 2²⁷ = 3939604133 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4073822861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2036910930 + 2036910931.

It is an arithmetic number, because the mean of its divisors is an integer number (2036910931).

Almost surely, 2^4073821861 is an apocalyptic number.

It is an amenable number.

4073821861 is a deficient number, since it is larger than the sum of its proper divisors (1).

4073821861 is an equidigital number, since it uses as much as digits as its factorization.

4073821861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 4073821861 is about 63826.4981101110. The cubic root of 4073821861 is about 1597.1069937087.

The spelling of 4073821861 in words is "four billion, seventy-three million, eight hundred twenty-one thousand, eight hundred sixty-one".