506486989 has 2 divisors, whose sum is σ = 506486990. Its totient is φ = 506486988.

The previous prime is 506486987. The next prime is 506487011. The reversal of 506486989 is 989684605.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 395015625 + 111471364 = 19875^2 + 10558^2 .

It is a cyclic number.

It is not a de Polignac number, because 506486989 - 2¹ = 506486987 is a prime.

It is a super-3 number, since 3×506486989³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 506486987, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (506486983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 253243494 + 253243495.

It is an arithmetic number, because the mean of its divisors is an integer number (253243495).

Almost surely, 2^506486989 is an apocalyptic number.

It is an amenable number.

506486989 is a deficient number, since it is larger than the sum of its proper divisors (1).

506486989 is an equidigital number, since it uses as much as digits as its factorization.

506486989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3732480, while the sum is 55.

The square root of 506486989 is about 22505.2658060286. The cubic root of 506486989 is about 797.1182721237.

The spelling of 506486989 in words is "five hundred six million, four hundred eighty-six thousand, nine hundred eighty-nine".