543661613 has 4 divisors (see below), whose sum is σ = 593085408. Its totient is φ = 494237820.

The previous prime is 543661607. The next prime is 543661631. The reversal of 543661613 is 316166345.

543661613 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 543661613 - 2¹⁰ = 543660589 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 (543661673) 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, 24711881 + ... + 24711902.

It is an arithmetic number, because the mean of its divisors is an integer number (148271352).

Almost surely, 2^543661613 is an apocalyptic number.

It is an amenable number.

543661613 is a deficient number, since it is larger than the sum of its proper divisors (49423795).

543661613 is a wasteful number, since it uses less digits than its factorization.

543661613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49423794.

The product of its digits is 38880, while the sum is 35.

The square root of 543661613 is about 23316.5523394862. The cubic root of 543661613 is about 816.1617231403.

The spelling of 543661613 in words is "five hundred forty-three million, six hundred sixty-one thousand, six hundred thirteen".