506191669 has 2 divisors, whose sum is σ = 506191670. Its totient is φ = 506191668.

The previous prime is 506191667. The next prime is 506191691. The reversal of 506191669 is 966191605.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 495596644 + 10595025 = 22262^2 + 3255^2 .

It is a cyclic number.

It is not a de Polignac number, because 506191669 - 2¹ = 506191667 is a prime.

It is a super-2 number, since 2×506191669² = 512460011530011122, which contains 22 as substring.

Together with 506191667, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (506191661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 253095834 + 253095835.

It is an arithmetic number, because the mean of its divisors is an integer number (253095835).

Almost surely, 2^506191669 is an apocalyptic number.

It is an amenable number.

506191669 is a deficient number, since it is larger than the sum of its proper divisors (1).

506191669 is an equidigital number, since it uses as much as digits as its factorization.

506191669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 87480, while the sum is 43.

The square root of 506191669 is about 22498.7037182145. The cubic root of 506191669 is about 796.9633153720.

The spelling of 506191669 in words is "five hundred six million, one hundred ninety-one thousand, six hundred sixty-nine".