4000444397 has 2 divisors, whose sum is σ = 4000444398. Its totient is φ = 4000444396.

The previous prime is 4000444387. The next prime is 4000444421. The reversal of 4000444397 is 7934440004.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3098703556 + 901740841 = 55666^2 + 30029^2 .

It is a cyclic number.

It is not a de Polignac number, because 4000444397 - 2⁸ = 4000444141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4000444307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2000222198 + 2000222199.

It is an arithmetic number, because the mean of its divisors is an integer number (2000222199).

Almost surely, 2^4000444397 is an apocalyptic number.

It is an amenable number.

4000444397 is a deficient number, since it is larger than the sum of its proper divisors (1).

4000444397 is an equidigital number, since it uses as much as digits as its factorization.

4000444397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48384, while the sum is 35.

The square root of 4000444397 is about 63249.0663725560. The cubic root of 4000444397 is about 1587.4598361467.

The spelling of 4000444397 in words is "four billion, four hundred forty-four thousand, three hundred ninety-seven".