505794865 has 4 divisors (see below), whose sum is σ = 606953844. Its totient is φ = 404635888.

The previous prime is 505794851. The next prime is 505794941. The reversal of 505794865 is 568497505.

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

It can be written as a sum of positive squares in 2 ways, for example, as 215296929 + 290497936 = 14673^2 + 17044^2 .

It is a cyclic number.

It is not a de Polignac number, because 505794865 - 2⁵ = 505794833 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50579482 + ... + 50579491.

It is an arithmetic number, because the mean of its divisors is an integer number (151738461).

Almost surely, 2^505794865 is an apocalyptic number.

It is an amenable number.

505794865 is a deficient number, since it is larger than the sum of its proper divisors (101158979).

505794865 is a wasteful number, since it uses less digits than its factorization.

505794865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101158978.

The product of its (nonzero) digits is 1512000, while the sum is 49.

The square root of 505794865 is about 22489.8836146388. The cubic root of 505794865 is about 796.7550142350.

The spelling of 505794865 in words is "five hundred five million, seven hundred ninety-four thousand, eight hundred sixty-five".