542491717 has 2 divisors, whose sum is σ = 542491718. Its totient is φ = 542491716.

The previous prime is 542491699. The next prime is 542491783. The reversal of 542491717 is 717194245.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 535968801 + 6522916 = 23151^2 + 2554^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-542491717 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 542491717.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (542441717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271245858 + 271245859.

It is an arithmetic number, because the mean of its divisors is an integer number (271245859).

Almost surely, 2^542491717 is an apocalyptic number.

It is an amenable number.

542491717 is a deficient number, since it is larger than the sum of its proper divisors (1).

542491717 is an equidigital number, since it uses as much as digits as its factorization.

542491717 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 70560, while the sum is 40.

The square root of 542491717 is about 23291.4515863653. The cubic root of 542491717 is about 815.5758746257.

The spelling of 542491717 in words is "five hundred forty-two million, four hundred ninety-one thousand, seven hundred seventeen".