536681 has 4 divisors (see below), whose sum is σ = 538692. Its totient is φ = 534672.

The previous prime is 536677. The next prime is 536687. The reversal of 536681 is 186635.

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

It can be written as a sum of positive squares in 2 ways, for example, as 102400 + 434281 = 320^2 + 659^2 .

It is a cyclic number.

It is not a de Polignac number, because 536681 - 2² = 536677 is a prime.

It is a super-2 number, since 2×536681² = 576052991522, which contains 22 as substring.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 536681.

It is not an unprimeable number, because it can be changed into a prime (536687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 530 + ... + 1163.

It is an arithmetic number, because the mean of its divisors is an integer number (134673).

2⁵³⁶⁶⁸¹ is an apocalyptic number.

It is an amenable number.

536681 is a deficient number, since it is larger than the sum of its proper divisors (2011).

536681 is a wasteful number, since it uses less digits than its factorization.

536681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2010.

The product of its digits is 4320, while the sum is 29.

The square root of 536681 is about 732.5851486346. The cubic root of 536681 is about 81.2653493683.

The spelling of 536681 in words is "five hundred thirty-six thousand, six hundred eighty-one".