505485289 has 3 divisors (see below), whose sum is σ = 505507773. Its totient is φ = 505462806.

The previous prime is 505485263. The next prime is 505485301. The reversal of 505485289 is 982584505.

The square root of 505485289 is 22483.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 505485289 - 2⁷ = 505485161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505485229) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 11242 + ... + 33724.

It is an arithmetic number, because the mean of its divisors is an integer number (168502591).

Almost surely, 2^505485289 is an apocalyptic number.

505485289 is the 22483-rd square number.

505485289 is the 11242-nd centered octagonal number.

It is an amenable number.

505485289 is a deficient number, since it is larger than the sum of its proper divisors (22484).

505485289 is an frugal number, since it uses more digits than its factorization.

505485289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44966 (or 22483 counting only the distinct ones).

The product of its (nonzero) digits is 576000, while the sum is 46.

The cubic root of 505485289 is about 796.5924275244.

The spelling of 505485289 in words is "five hundred five million, four hundred eighty-five thousand, two hundred eighty-nine".