505783172 has 6 divisors (see below), whose sum is σ = 885120558. Its totient is φ = 252891584.

The previous prime is 505783169. The next prime is 505783177. The reversal of 505783172 is 271387505.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 485497156 + 20286016 = 22034^2 + 4504^2 .

It is not an unprimeable number, because it can be changed into a prime (505783177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63222893 + ... + 63222900.

It is an arithmetic number, because the mean of its divisors is an integer number (147520093).

Almost surely, 2^505783172 is an apocalyptic number.

It is an amenable number.

505783172 is a deficient number, since it is larger than the sum of its proper divisors (379337386).

505783172 is a wasteful number, since it uses less digits than its factorization.

505783172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126445797 (or 126445795 counting only the distinct ones).

The product of its (nonzero) digits is 58800, while the sum is 38.

The square root of 505783172 is about 22489.6236518088. The cubic root of 505783172 is about 796.7488743755.

The spelling of 505783172 in words is "five hundred five million, seven hundred eighty-three thousand, one hundred seventy-two".