505000004 has 6 divisors (see below), whose sum is σ = 883750014. Its totient is φ = 252500000.

The previous prime is 505000003. The next prime is 505000033. The reversal of 505000004 is 400000505.

It can be written as a sum of positive squares in only one way, i.e., 357134404 + 147865600 = 18898^2 + 12160^2 .

It is not an unprimeable number, because it can be changed into a prime (505000003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63124997 + ... + 63125004.

It is an arithmetic number, because the mean of its divisors is an integer number (147291669).

Almost surely, 2^505000004 is an apocalyptic number.

It is an amenable number.

505000004 is a deficient number, since it is larger than the sum of its proper divisors (378750010).

505000004 is a wasteful number, since it uses less digits than its factorization.

505000004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126250005 (or 126250003 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 14.

The square root of 505000004 is about 22472.2051432431. The cubic root of 505000004 is about 796.3374262815.

Adding to 505000004 its reverse (400000505), we get a palindrome (905000509).

The spelling of 505000004 in words is "five hundred five million, four", and thus it is an aban number.