540240109 has 2 divisors, whose sum is σ = 540240110. Its totient is φ = 540240108.

The previous prime is 540240097. The next prime is 540240121. The reversal of 540240109 is 901042045.

It is a balanced prime because it is at equal distance from previous prime (540240097) and next prime (540240121).

It can be written as a sum of positive squares in only one way, i.e., 295943209 + 244296900 = 17203^2 + 15630^2 .

It is a cyclic number.

It is not a de Polignac number, because 540240109 - 2¹³ = 540231917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (540240179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 270120054 + 270120055.

It is an arithmetic number, because the mean of its divisors is an integer number (270120055).

Almost surely, 2^540240109 is an apocalyptic number.

It is an amenable number.

540240109 is a deficient number, since it is larger than the sum of its proper divisors (1).

540240109 is an equidigital number, since it uses as much as digits as its factorization.

540240109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 540240109 is about 23243.0658261771. The cubic root of 540240109 is about 814.4459626679.

The spelling of 540240109 in words is "five hundred forty million, two hundred forty thousand, one hundred nine".