540720517 has 2 divisors, whose sum is σ = 540720518. Its totient is φ = 540720516.

The previous prime is 540720491. The next prime is 540720533. The reversal of 540720517 is 715027045.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 406183716 + 134536801 = 20154^2 + 11599^2 .

It is a cyclic number.

It is not a de Polignac number, because 540720517 - 2¹¹ = 540718469 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (540723517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 270360258 + 270360259.

It is an arithmetic number, because the mean of its divisors is an integer number (270360259).

Almost surely, 2^540720517 is an apocalyptic number.

It is an amenable number.

540720517 is a deficient number, since it is larger than the sum of its proper divisors (1).

540720517 is an equidigital number, since it uses as much as digits as its factorization.

540720517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9800, while the sum is 31.

The square root of 540720517 is about 23253.3979667489. The cubic root of 540720517 is about 814.6873062415.

The spelling of 540720517 in words is "five hundred forty million, seven hundred twenty thousand, five hundred seventeen".