505445117 has 2 divisors, whose sum is σ = 505445118. Its totient is φ = 505445116.

The previous prime is 505445093. The next prime is 505445131. The reversal of 505445117 is 711544505.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 288354361 + 217090756 = 16981^2 + 14734^2 .

It is a cyclic number.

It is not a de Polignac number, because 505445117 - 2⁶ = 505445053 is a prime.

It is a Chen prime.

It is equal to p_26627126 and since 505445117 and 26627126 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505445167) 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, 252722558 + 252722559.

It is an arithmetic number, because the mean of its divisors is an integer number (252722559).

Almost surely, 2^505445117 is an apocalyptic number.

It is an amenable number.

505445117 is a deficient number, since it is larger than the sum of its proper divisors (1).

505445117 is an equidigital number, since it uses as much as digits as its factorization.

505445117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14000, while the sum is 32.

The square root of 505445117 is about 22482.1065961355. The cubic root of 505445117 is about 796.5713246624.

The spelling of 505445117 in words is "five hundred five million, four hundred forty-five thousand, one hundred seventeen".