4038394861 has 2 divisors, whose sum is σ = 4038394862. Its totient is φ = 4038394860.

The previous prime is 4038394849. The next prime is 4038394903. The reversal of 4038394861 is 1684938304.

4038394861 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3867596100 + 170798761 = 62190^2 + 13069^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4038394861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4038394961) 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, 2019197430 + 2019197431.

It is an arithmetic number, because the mean of its divisors is an integer number (2019197431).

Almost surely, 2^4038394861 is an apocalyptic number.

It is an amenable number.

4038394861 is a deficient number, since it is larger than the sum of its proper divisors (1).

4038394861 is an equidigital number, since it uses as much as digits as its factorization.

4038394861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 497664, while the sum is 46.

The square root of 4038394861 is about 63548.3663125969. The cubic root of 4038394861 is about 1592.4638910015.

The spelling of 4038394861 in words is "four billion, thirty-eight million, three hundred ninety-four thousand, eight hundred sixty-one".