440440847989 has 2 divisors, whose sum is σ = 440440847990. Its totient is φ = 440440847988.

The previous prime is 440440847983. The next prime is 440440848049. The reversal of 440440847989 is 989748044044.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 276449866225 + 163990981764 = 525785^2 + 404958^2 .

It is a cyclic number.

It is not a de Polignac number, because 440440847989 - 2⁹ = 440440847477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (440440847983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220220423994 + 220220423995.

It is an arithmetic number, because the mean of its divisors is an integer number (220220423995).

Almost surely, 2^440440847989 is an apocalyptic number.

It is an amenable number.

440440847989 is a deficient number, since it is larger than the sum of its proper divisors (1).

440440847989 is an equidigital number, since it uses as much as digits as its factorization.

440440847989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37158912, while the sum is 61.

The spelling of 440440847989 in words is "four hundred forty billion, four hundred forty million, eight hundred forty-seven thousand, nine hundred eighty-nine".