505365905 has 16 divisors (see below), whose sum is σ = 666629568. Its totient is φ = 364728000.

The previous prime is 505365899. The next prime is 505365961. The reversal of 505365905 is 509563505.

It is a happy number.

It is not a de Polignac number, because 505365905 - 2⁶ = 505365841 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27866 + ... + 42275.

It is an arithmetic number, because the mean of its divisors is an integer number (41664348).

Almost surely, 2^505365905 is an apocalyptic number.

505365905 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

505365905 is a deficient number, since it is larger than the sum of its proper divisors (161263663).

505365905 is a wasteful number, since it uses less digits than its factorization.

505365905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70288.

The product of its (nonzero) digits is 101250, while the sum is 38.

The square root of 505365905 is about 22480.3448594544. The cubic root of 505365905 is about 796.5297103163.

The spelling of 505365905 in words is "five hundred five million, three hundred sixty-five thousand, nine hundred five".