441439987 has 2 divisors, whose sum is σ = 441439988. Its totient is φ = 441439986.

The previous prime is 441439967. The next prime is 441440009. The reversal of 441439987 is 789934144.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 441439987 - 2²³ = 433051379 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 441439987.

It is not a weakly prime, because it can be changed into another prime (441439927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220719993 + 220719994.

It is an arithmetic number, because the mean of its divisors is an integer number (220719994).

Almost surely, 2^441439987 is an apocalyptic number.

441439987 is a deficient number, since it is larger than the sum of its proper divisors (1).

441439987 is an equidigital number, since it uses as much as digits as its factorization.

441439987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 870912, while the sum is 49.

The square root of 441439987 is about 21010.4732693007. The cubic root of 441439987 is about 761.4193162369.

The spelling of 441439987 in words is "four hundred forty-one million, four hundred thirty-nine thousand, nine hundred eighty-seven".