505212640997 has 2 divisors, whose sum is σ = 505212640998. Its totient is φ = 505212640996.

The previous prime is 505212640963. The next prime is 505212641047. The reversal of 505212640997 is 799046212505.

It is an a-pointer prime, because the next prime (505212641047) can be obtained adding 505212640997 to its sum of digits (50).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 428770897636 + 76441743361 = 654806^2 + 276481^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505212640997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505212640397) 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, 252606320498 + 252606320499.

It is an arithmetic number, because the mean of its divisors is an integer number (252606320499).

Almost surely, 2^505212640997 is an apocalyptic number.

It is an amenable number.

505212640997 is a deficient number, since it is larger than the sum of its proper divisors (1).

505212640997 is an equidigital number, since it uses as much as digits as its factorization.

505212640997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1360800, while the sum is 50.

The spelling of 505212640997 in words is "five hundred five billion, two hundred twelve million, six hundred forty thousand, nine hundred ninety-seven".