540260509 has 2 divisors, whose sum is σ = 540260510. Its totient is φ = 540260508.

The previous prime is 540260491. The next prime is 540260521. The reversal of 540260509 is 905062045.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 360620100 + 179640409 = 18990^2 + 13403^2 .

It is a cyclic number.

It is not a de Polignac number, because 540260509 - 2⁵ = 540260477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (540260549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 270130254 + 270130255.

It is an arithmetic number, because the mean of its divisors is an integer number (270130255).

Almost surely, 2^540260509 is an apocalyptic number.

It is an amenable number.

540260509 is a deficient number, since it is larger than the sum of its proper divisors (1).

540260509 is an equidigital number, since it uses as much as digits as its factorization.

540260509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 540260509 is about 23243.5046625934. The cubic root of 540260509 is about 814.4562139668.

The spelling of 540260509 in words is "five hundred forty million, two hundred sixty thousand, five hundred nine".