439575047981 has 2 divisors, whose sum is σ = 439575047982. Its totient is φ = 439575047980.

The previous prime is 439575047957. The next prime is 439575047999. The reversal of 439575047981 is 189740575934.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 393235597225 + 46339450756 = 627085^2 + 215266^2 .

It is a cyclic number.

It is not a de Polignac number, because 439575047981 - 2¹⁰ = 439575046957 is a prime.

It is a super-2 number, since 2×439575047981² (a number of 24 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (439575047911) 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, 219787523990 + 219787523991.

It is an arithmetic number, because the mean of its divisors is an integer number (219787523991).

Almost surely, 2^439575047981 is an apocalyptic number.

It is an amenable number.

439575047981 is a deficient number, since it is larger than the sum of its proper divisors (1).

439575047981 is an equidigital number, since it uses as much as digits as its factorization.

439575047981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38102400, while the sum is 62.

The spelling of 439575047981 in words is "four hundred thirty-nine billion, five hundred seventy-five million, forty-seven thousand, nine hundred eighty-one".