540731709 has 36 divisors (see below), whose sum is σ = 939928860. Its totient is φ = 298327680.

The previous prime is 540731689. The next prime is 540731731. The reversal of 540731709 is 907137045.

It is a happy number.

540731709 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 434847609 + 105884100 = 20853^2 + 10290^2 .

It is not a de Polignac number, because 540731709 - 2⁵ = 540731677 is a prime.

It is a super-2 number, since 2×540731709² = 584781562236121362, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (540731749) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 8352 + ... + 33929.

It is an arithmetic number, because the mean of its divisors is an integer number (26109135).

Almost surely, 2^540731709 is an apocalyptic number.

It is an amenable number.

540731709 is a deficient number, since it is larger than the sum of its proper divisors (399197151).

540731709 is a wasteful number, since it uses less digits than its factorization.

540731709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42330 (or 42320 counting only the distinct ones).

The product of its (nonzero) digits is 26460, while the sum is 36.

The square root of 540731709 is about 23253.6386185044. The cubic root of 540731709 is about 814.6929270858.

The spelling of 540731709 in words is "five hundred forty million, seven hundred thirty-one thousand, seven hundred nine".