539643 has 16 divisors (see below), whose sum is σ = 788256. Its totient is φ = 326400.

The previous prime is 539641. The next prime is 539653. The reversal of 539643 is 346935.

It is a happy number.

It is not a de Polignac number, because 539643 - 2¹ = 539641 is a prime.

539643 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 539643.

It is not an unprimeable number, because it can be changed into a prime (539641) 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 15 ways as a sum of consecutive naturals, for example, 3871 + ... + 4007.

It is an arithmetic number, because the mean of its divisors is an integer number (49266).

2⁵³⁹⁶⁴³ is an apocalyptic number.

539643 is a deficient number, since it is larger than the sum of its proper divisors (248613).

539643 is a wasteful number, since it uses less digits than its factorization.

539643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254.

The product of its digits is 9720, while the sum is 30.

The square root of 539643 is about 734.6039749416. The cubic root of 539643 is about 81.4145792253.

The spelling of 539643 in words is "five hundred thirty-nine thousand, six hundred forty-three".