543649 has 8 divisors (see below), whose sum is σ = 570240. Its totient is φ = 517776.

The previous prime is 543637. The next prime is 543659. The reversal of 543649 is 946345.

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 543649 - 2⁵ = 543617 is a prime.

It is a d-powerful number, because it can be written as 5⁵ + 4⁴ + 6⁵ + 3³ + 4⁵ + 9⁶ .

It is a Duffinian number.

543649 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 543649.

It is not an unprimeable number, because it can be changed into a prime (543659) 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, 1887 + ... + 2155.

It is an arithmetic number, because the mean of its divisors is an integer number (71280).

2⁵⁴³⁶⁴⁹ is an apocalyptic number.

It is an amenable number.

543649 is a deficient number, since it is larger than the sum of its proper divisors (26591).

543649 is a wasteful number, since it uses less digits than its factorization.

543649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359.

The product of its digits is 12960, while the sum is 31.

The square root of 543649 is about 737.3255725933. The cubic root of 543649 is about 81.6155411415.

The spelling of 543649 in words is "five hundred forty-three thousand, six hundred forty-nine".