540139653 has 12 divisors (see below), whose sum is σ = 801288748. Its totient is φ = 350360640.

The previous prime is 540139627. The next prime is 540139667. The reversal of 540139653 is 356931045.

It can be written as a sum of positive squares in 2 ways, for example, as 322813089 + 217326564 = 17967^2 + 14742^2 .

It is not a de Polignac number, because 540139653 - 2¹⁰ = 540138629 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (540139603) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 810688 + ... + 811353.

Almost surely, 2^540139653 is an apocalyptic number.

It is an amenable number.

540139653 is a deficient number, since it is larger than the sum of its proper divisors (261149095).

540139653 is a wasteful number, since it uses less digits than its factorization.

540139653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1622084 (or 1622081 counting only the distinct ones).

The product of its (nonzero) digits is 48600, while the sum is 36.

The square root of 540139653 is about 23240.9047371224. The cubic root of 540139653 is about 814.3954782914.

It can be divided in two parts, 5401 and 39653, that added together give a palindrome (45054).

The spelling of 540139653 in words is "five hundred forty million, one hundred thirty-nine thousand, six hundred fifty-three".