505007993 has 4 divisors (see below), whose sum is σ = 577152000. Its totient is φ = 432863988.

The previous prime is 505007981. The next prime is 505007999. The reversal of 505007993 is 399700505.

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.

It is a cyclic number.

It is not a de Polignac number, because 505007993 - 2⁴ = 505007977 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (505007999) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36071993 + ... + 36072006.

It is an arithmetic number, because the mean of its divisors is an integer number (144288000).

Almost surely, 2^505007993 is an apocalyptic number.

It is an amenable number.

505007993 is a deficient number, since it is larger than the sum of its proper divisors (72144007).

505007993 is an equidigital number, since it uses as much as digits as its factorization.

505007993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72144006.

The product of its (nonzero) digits is 42525, while the sum is 38.

The square root of 505007993 is about 22472.3828954564. The cubic root of 505007993 is about 796.3416255594.

The spelling of 505007993 in words is "five hundred five million, seven thousand, nine hundred ninety-three".