63439000643 has 2 divisors, whose sum is σ = 63439000644. Its totient is φ = 63439000642.

The previous prime is 63439000631. The next prime is 63439000673. The reversal of 63439000643 is 34600093436.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 63439000643 - 2¹⁶ = 63438935107 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 63439000597 and 63439000606.

It is not a weakly prime, because it can be changed into another prime (63439000613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31719500321 + 31719500322.

It is an arithmetic number, because the mean of its divisors is an integer number (31719500322).

Almost surely, 2^63439000643 is an apocalyptic number.

63439000643 is a deficient number, since it is larger than the sum of its proper divisors (1).

63439000643 is an equidigital number, since it uses as much as digits as its factorization.

63439000643 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 139968, while the sum is 38.

The spelling of 63439000643 in words is "sixty-three billion, four hundred thirty-nine million, six hundred forty-three", and thus it is an aban number.