63864443 has 2 divisors, whose sum is σ = 63864444. Its totient is φ = 63864442.

The previous prime is 63864431. The next prime is 63864457. The reversal of 63864443 is 34446836.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 63864443 - 2¹⁶ = 63798907 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 63864397 and 63864406.

It is not a weakly prime, because it can be changed into another prime (63864343) 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, 31932221 + 31932222.

It is an arithmetic number, because the mean of its divisors is an integer number (31932222).

Almost surely, 2^63864443 is an apocalyptic number.

63864443 is a deficient number, since it is larger than the sum of its proper divisors (1).

63864443 is an equidigital number, since it uses as much as digits as its factorization.

63864443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 165888, while the sum is 38.

The square root of 63864443 is about 7991.5231964876. The cubic root of 63864443 is about 399.7173899593.

The spelling of 63864443 in words is "sixty-three million, eight hundred sixty-four thousand, four hundred forty-three".