1020063643 has 2 divisors, whose sum is σ = 1020063644. Its totient is φ = 1020063642.

The previous prime is 1020063613. The next prime is 1020063679. The reversal of 1020063643 is 3463600201.

It is a weak prime.

It is an emirp because it is prime and its reverse (3463600201) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1020063643 is a prime.

It is not a weakly prime, because it can be changed into another prime (1020063613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510031821 + 510031822.

It is an arithmetic number, because the mean of its divisors is an integer number (510031822).

Almost surely, 2^1020063643 is an apocalyptic number.

1020063643 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020063643 is an equidigital number, since it uses as much as digits as its factorization.

1020063643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 1020063643 is about 31938.4351996149. The cubic root of 1020063643 is about 1006.6436452322.

Adding to 1020063643 its reverse (3463600201), we get a palindrome (4483663844).

The spelling of 1020063643 in words is "one billion, twenty million, sixty-three thousand, six hundred forty-three".