501540073 has 2 divisors, whose sum is σ = 501540074. Its totient is φ = 501540072.

The previous prime is 501540023. The next prime is 501540077. The reversal of 501540073 is 370045105.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 419963049 + 81577024 = 20493^2 + 9032^2 .

It is a cyclic number.

It is not a de Polignac number, because 501540073 - 2¹³ = 501531881 is a prime.

It is not a weakly prime, because it can be changed into another prime (501540077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250770036 + 250770037.

It is an arithmetic number, because the mean of its divisors is an integer number (250770037).

Almost surely, 2^501540073 is an apocalyptic number.

It is an amenable number.

501540073 is a deficient number, since it is larger than the sum of its proper divisors (1).

501540073 is an equidigital number, since it uses as much as digits as its factorization.

501540073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2100, while the sum is 25.

The square root of 501540073 is about 22395.0903771340. The cubic root of 501540073 is about 794.5145952380.

Adding to 501540073 its reverse (370045105), we get a palindrome (871585178).

The spelling of 501540073 in words is "five hundred one million, five hundred forty thousand, seventy-three".