505005005 has 4 divisors (see below), whose sum is σ = 606006012. Its totient is φ = 404004000.

The previous prime is 505005001. The next prime is 505005019. The reversal of 505005005 is 500500505.

It is a happy number.

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 271129156 + 233875849 = 16466^2 + 15293^2 .

It is not a de Polignac number, because 505005005 - 2² = 505005001 is a prime.

It is a Duffinian number.

505005005 is a modest number, since divided by 5005 gives 505 as remainder.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505005001) 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, 50500496 + ... + 50500505.

It is an arithmetic number, because the mean of its divisors is an integer number (151501503).

Almost surely, 2^505005005 is an apocalyptic number.

It is an amenable number.

505005005 is a deficient number, since it is larger than the sum of its proper divisors (101001007).

505005005 is a wasteful number, since it uses less digits than its factorization.

505005005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101001006.

The product of its (nonzero) digits is 625, while the sum is 20.

The square root of 505005005 is about 22472.3164137567. The cubic root of 505005005 is about 796.3400549747.

It can be divided in two parts, 50500500 and 5, that added together give a palindrome (50500505).

The spelling of 505005005 in words is "five hundred five million, five thousand, five".