505000000493 has 4 divisors (see below), whose sum is σ = 505683357120. Its totient is φ = 504316643868.

The previous prime is 505000000481. The next prime is 505000000553. The reversal of 505000000493 is 394000000505.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 394000000505 = 5 ⋅78800000101.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505000000493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505000000403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 341677205 + ... + 341678682.

It is an arithmetic number, because the mean of its divisors is an integer number (126420839280).

Almost surely, 2^505000000493 is an apocalyptic number.

It is an amenable number.

505000000493 is a deficient number, since it is larger than the sum of its proper divisors (683356627).

505000000493 is an equidigital number, since it uses as much as digits as its factorization.

505000000493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 683356626.

The product of its (nonzero) digits is 2700, while the sum is 26.

Adding to 505000000493 its reverse (394000000505), we get a palindrome (899000000998).

The spelling of 505000000493 in words is "five hundred five billion, four hundred ninety-three", and thus it is an aban number.