1063631543 has 4 divisors (see below), whose sum is σ = 1145449368. Its totient is φ = 981813720.

The previous prime is 1063631539. The next prime is 1063631551. The reversal of 1063631543 is 3451363601.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1063631543 - 2² = 1063631539 is a prime.

It is a super-2 number, since 2×1063631543² = 2262624118529121698, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1063631593) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40908893 + ... + 40908918.

It is an arithmetic number, because the mean of its divisors is an integer number (286362342).

Almost surely, 2^1063631543 is an apocalyptic number.

1063631543 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1063631543 is a deficient number, since it is larger than the sum of its proper divisors (81817825).

1063631543 is an equidigital number, since it uses as much as digits as its factorization.

1063631543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81817824.

The product of its (nonzero) digits is 19440, while the sum is 32.

The square root of 1063631543 is about 32613.3644845177. The cubic root of 1063631543 is about 1020.7758876099.

The spelling of 1063631543 in words is "one billion, sixty-three million, six hundred thirty-one thousand, five hundred forty-three".