505820938247 has 2 divisors, whose sum is σ = 505820938248. Its totient is φ = 505820938246.

The previous prime is 505820938237. The next prime is 505820938289. The reversal of 505820938247 is 742839028505.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505820938247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (505820938237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252910469123 + 252910469124.

It is an arithmetic number, because the mean of its divisors is an integer number (252910469124).

Almost surely, 2^505820938247 is an apocalyptic number.

505820938247 is a deficient number, since it is larger than the sum of its proper divisors (1).

505820938247 is an equidigital number, since it uses as much as digits as its factorization.

505820938247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4838400, while the sum is 53.

The spelling of 505820938247 in words is "five hundred five billion, eight hundred twenty million, nine hundred thirty-eight thousand, two hundred forty-seven".