863749543 has 16 divisors (see below), whose sum is σ = 908661600. Its totient is φ = 819947520.

The previous prime is 863749541. The next prime is 863749553. The reversal of 863749543 is 345947368.

It is a cyclic number.

It is not a de Polignac number, because 863749543 - 2¹ = 863749541 is a prime.

It is a super-3 number, since 3×863749543³ (a number of 28 digits) contains 333 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 (863749541) 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 in 15 ways as a sum of consecutive naturals, for example, 579343 + ... + 580831.

It is an arithmetic number, because the mean of its divisors is an integer number (56791350).

Almost surely, 2^863749543 is an apocalyptic number.

863749543 is a gapful number since it is divisible by the number (83) formed by its first and last digit.

863749543 is a deficient number, since it is larger than the sum of its proper divisors (44912057).

863749543 is a wasteful number, since it uses less digits than its factorization.

863749543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1842.

The product of its digits is 2177280, while the sum is 49.

The square root of 863749543 is about 29389.6162445174. The cubic root of 863749543 is about 952.3485908735.

The spelling of 863749543 in words is "eight hundred sixty-three million, seven hundred forty-nine thousand, five hundred forty-three".