535639 has 4 divisors (see below), whose sum is σ = 576856. Its totient is φ = 494424.

The previous prime is 535637. The next prime is 535663. The reversal of 535639 is 936535.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 535639 - 2¹ = 535637 is a prime.

It is a d-powerful number, because it can be written as 5³ + 3 + 6³ + 5⁵ + 3¹² + 9³ .

It is a Duffinian number.

535639 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 535639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (535637) 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, 20589 + ... + 20614.

It is an arithmetic number, because the mean of its divisors is an integer number (144214).

2⁵³⁵⁶³⁹ is an apocalyptic number.

535639 is a deficient number, since it is larger than the sum of its proper divisors (41217).

535639 is a wasteful number, since it uses less digits than its factorization.

535639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41216.

The product of its digits is 12150, while the sum is 31.

The square root of 535639 is about 731.8736229705. The cubic root of 535639 is about 81.2127213602.

The spelling of 535639 in words is "five hundred thirty-five thousand, six hundred thirty-nine".