540485009 has 2 divisors, whose sum is σ = 540485010. Its totient is φ = 540485008.

The previous prime is 540484933. The next prime is 540485053. The reversal of 540485009 is 900584045.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 384160000 + 156325009 = 19600^2 + 12503^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-540485009 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 540485009.

It is not a weakly prime, because it can be changed into another prime (540485059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 270242504 + 270242505.

It is an arithmetic number, because the mean of its divisors is an integer number (270242505).

Almost surely, 2^540485009 is an apocalyptic number.

It is an amenable number.

540485009 is a deficient number, since it is larger than the sum of its proper divisors (1).

540485009 is an equidigital number, since it uses as much as digits as its factorization.

540485009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 540485009 is about 23248.3334671542. Note that the first 3 decimals coincide. The cubic root of 540485009 is about 814.5690114638.

The spelling of 540485009 in words is "five hundred forty million, four hundred eighty-five thousand, nine".