505213171189 has 2 divisors, whose sum is σ = 505213171190. Its totient is φ = 505213171188.

The previous prime is 505213171163. The next prime is 505213171193. The reversal of 505213171189 is 981171312505.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 467486712900 + 37726458289 = 683730^2 + 194233^2 .

It is a cyclic number.

It is not a de Polignac number, because 505213171189 - 2⁷ = 505213171061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505213171889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252606585594 + 252606585595.

It is an arithmetic number, because the mean of its divisors is an integer number (252606585595).

Almost surely, 2^505213171189 is an apocalyptic number.

It is an amenable number.

505213171189 is a deficient number, since it is larger than the sum of its proper divisors (1).

505213171189 is an equidigital number, since it uses as much as digits as its factorization.

505213171189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 75600, while the sum is 43.

The spelling of 505213171189 in words is "five hundred five billion, two hundred thirteen million, one hundred seventy-one thousand, one hundred eighty-nine".