505688093 has 4 divisors (see below), whose sum is σ = 506373120. Its totient is φ = 505003068.

The previous prime is 505688039. The next prime is 505688101. The reversal of 505688093 is 390886505.

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 505688093 - 2⁸ = 505687837 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 (505688003) 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, 341405 + ... + 342882.

It is an arithmetic number, because the mean of its divisors is an integer number (126593280).

Almost surely, 2^505688093 is an apocalyptic number.

It is an amenable number.

505688093 is a deficient number, since it is larger than the sum of its proper divisors (685027).

505688093 is an equidigital number, since it uses as much as digits as its factorization.

505688093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685026.

The product of its (nonzero) digits is 259200, while the sum is 44.

The square root of 505688093 is about 22487.5097109484. The cubic root of 505688093 is about 796.6989459755.

The spelling of 505688093 in words is "five hundred five million, six hundred eighty-eight thousand, ninety-three".