540653021 has 2 divisors, whose sum is σ = 540653022. Its totient is φ = 540653020.

The previous prime is 540652997. The next prime is 540653033. The reversal of 540653021 is 120356045.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 510127396 + 30525625 = 22586^2 + 5525^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-540653021 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (540653041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 270326510 + 270326511.

It is an arithmetic number, because the mean of its divisors is an integer number (270326511).

Almost surely, 2^540653021 is an apocalyptic number.

It is an amenable number.

540653021 is a deficient number, since it is larger than the sum of its proper divisors (1).

540653021 is an equidigital number, since it uses as much as digits as its factorization.

540653021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 540653021 is about 23251.9466066822. The cubic root of 540653021 is about 814.6534067680.

The spelling of 540653021 in words is "five hundred forty million, six hundred fifty-three thousand, twenty-one".