505706165 has 8 divisors (see below), whose sum is σ = 616796088. Its totient is φ = 397932480.

The previous prime is 505706119. The next prime is 505706171. The reversal of 505706165 is 561607505.

It can be written as a sum of positive squares in 4 ways, for example, as 28633201 + 477072964 = 5351^2 + 21842^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 505706165 - 2¹⁰ = 505705141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 828722 + ... + 829331.

It is an arithmetic number, because the mean of its divisors is an integer number (77099511).

Almost surely, 2^505706165 is an apocalyptic number.

It is an amenable number.

505706165 is a deficient number, since it is larger than the sum of its proper divisors (111089923).

505706165 is a wasteful number, since it uses less digits than its factorization.

505706165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1658119.

The product of its (nonzero) digits is 31500, while the sum is 35.

The square root of 505706165 is about 22487.9115304201. The cubic root of 505706165 is about 796.7084365239.

The spelling of 505706165 in words is "five hundred five million, seven hundred six thousand, one hundred sixty-five".