505893161 has 4 divisors (see below), whose sum is σ = 506976912. Its totient is φ = 504809412.

The previous prime is 505893149. The next prime is 505893163. The reversal of 505893161 is 161398505.

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 a de Polignac number, because none of the positive numbers 2^k-505893161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505893163) 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, 541175 + ... + 542108.

It is an arithmetic number, because the mean of its divisors is an integer number (126744228).

Almost surely, 2^505893161 is an apocalyptic number.

It is an amenable number.

505893161 is a deficient number, since it is larger than the sum of its proper divisors (1083751).

505893161 is a wasteful number, since it uses less digits than its factorization.

505893161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1083750.

The product of its (nonzero) digits is 32400, while the sum is 38.

The square root of 505893161 is about 22492.0688465957. The cubic root of 505893161 is about 796.8066245903.

The spelling of 505893161 in words is "five hundred five million, eight hundred ninety-three thousand, one hundred sixty-one".