543999989 has 8 divisors (see below), whose sum is σ = 588625632. Its totient is φ = 499771440.

The previous prime is 543999977. The next prime is 544000069. The reversal of 543999989 is 989999345.

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 543999989 - 2¹⁶ = 543934453 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 (543999919) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96419 + ... + 101904.

It is an arithmetic number, because the mean of its divisors is an integer number (73578204).

Almost surely, 2^543999989 is an apocalyptic number.

It is an amenable number.

543999989 is a deficient number, since it is larger than the sum of its proper divisors (44625643).

543999989 is a wasteful number, since it uses less digits than its factorization.

543999989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198547.

The product of its digits is 28343520, while the sum is 65.

The square root of 543999989 is about 23323.8073435706. The cubic root of 543999989 is about 816.3310148812.

The spelling of 543999989 in words is "five hundred forty-three million, nine hundred ninety-nine thousand, nine hundred eighty-nine".