540665737 has 4 divisors (see below), whose sum is σ = 540766276. Its totient is φ = 540565200.

The previous prime is 540665731. The next prime is 540665747. The reversal of 540665737 is 737566045.

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 357361216 + 183304521 = 18904^2 + 13539^2 .

It is a cyclic number.

It is not a de Polignac number, because 540665737 - 2¹¹ = 540663689 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 540665693 and 540665702.

It is not an unprimeable number, because it can be changed into a prime (540665731) 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, 41718 + ... + 53119.

It is an arithmetic number, because the mean of its divisors is an integer number (135191569).

Almost surely, 2^540665737 is an apocalyptic number.

It is an amenable number.

540665737 is a deficient number, since it is larger than the sum of its proper divisors (100539).

540665737 is an equidigital number, since it uses as much as digits as its factorization.

540665737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100538.

The product of its (nonzero) digits is 529200, while the sum is 43.

The square root of 540665737 is about 23252.2200445463. The cubic root of 540665737 is about 814.6597935208.

The spelling of 540665737 in words is "five hundred forty million, six hundred sixty-five thousand, seven hundred thirty-seven".