505135887 has 4 divisors (see below), whose sum is σ = 673514520. Its totient is φ = 336757256.

The previous prime is 505135871. The next prime is 505135901. The reversal of 505135887 is 788531505.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 505135887 - 2⁴ = 505135871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505135817) 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, 84189312 + ... + 84189317.

It is an arithmetic number, because the mean of its divisors is an integer number (168378630).

Almost surely, 2^505135887 is an apocalyptic number.

505135887 is a deficient number, since it is larger than the sum of its proper divisors (168378633).

505135887 is a wasteful number, since it uses less digits than its factorization.

505135887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168378632.

The product of its (nonzero) digits is 168000, while the sum is 42.

The square root of 505135887 is about 22475.2282969495. The cubic root of 505135887 is about 796.4088447723.

The spelling of 505135887 in words is "five hundred five million, one hundred thirty-five thousand, eight hundred eighty-seven".