540425209 has 2 divisors, whose sum is σ = 540425210. Its totient is φ = 540425208.

The previous prime is 540425203. The next prime is 540425231. The reversal of 540425209 is 902524045.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 516561984 + 23863225 = 22728^2 + 4885^2 .

It is a cyclic number.

It is not a de Polignac number, because 540425209 - 2²¹ = 538328057 is a prime.

It is not a weakly prime, because it can be changed into another prime (540425203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 270212604 + 270212605.

It is an arithmetic number, because the mean of its divisors is an integer number (270212605).

Almost surely, 2^540425209 is an apocalyptic number.

It is an amenable number.

540425209 is a deficient number, since it is larger than the sum of its proper divisors (1).

540425209 is an equidigital number, since it uses as much as digits as its factorization.

540425209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 540425209 is about 23247.0473178853. The cubic root of 540425209 is about 814.5389686796.

The spelling of 540425209 in words is "five hundred forty million, four hundred twenty-five thousand, two hundred nine".