535438681 has 12 divisors (see below), whose sum is σ = 569631132. Its totient is φ = 503195648.

The previous prime is 535438679. The next prime is 535438699. The reversal of 535438681 is 186834535.

It can be written as a sum of positive squares in 6 ways, for example, as 2752281 + 532686400 = 1659^2 + 23080^2 .

It is not a de Polignac number, because 535438681 - 2¹ = 535438679 is a prime.

It is a super-2 number, since 2×535438681² = 573389162222039522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (535438621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 344001 + ... + 345553.

It is an arithmetic number, because the mean of its divisors is an integer number (47469261).

Almost surely, 2^535438681 is an apocalyptic number.

It is an amenable number.

535438681 is a deficient number, since it is larger than the sum of its proper divisors (34192451).

535438681 is a wasteful number, since it uses less digits than its factorization.

535438681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2780 (or 2763 counting only the distinct ones).

The product of its digits is 345600, while the sum is 43.

The square root of 535438681 is about 23139.5479860779. The cubic root of 535438681 is about 812.0259608329.

The spelling of 535438681 in words is "five hundred thirty-five million, four hundred thirty-eight thousand, six hundred eighty-one".