543139861 has 8 divisors (see below), whose sum is σ = 592731648. Its totient is φ = 493584000.

The previous prime is 543139853. The next prime is 543139873. The reversal of 543139861 is 168931345.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 543139861 - 2³ = 543139853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (543139801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30021 + ... + 44581.

It is an arithmetic number, because the mean of its divisors is an integer number (74091456).

Almost surely, 2^543139861 is an apocalyptic number.

It is an amenable number.

543139861 is a deficient number, since it is larger than the sum of its proper divisors (49591787).

543139861 is a wasteful number, since it uses less digits than its factorization.

543139861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17963.

The product of its digits is 77760, while the sum is 40.

The square root of 543139861 is about 23305.3612072416. The cubic root of 543139861 is about 815.9005494628.

The spelling of 543139861 in words is "five hundred forty-three million, one hundred thirty-nine thousand, eight hundred sixty-one".