505647 has 12 divisors (see below), whose sum is σ = 769080. Its totient is φ = 319248.

The previous prime is 505643. The next prime is 505657. The reversal of 505647 is 746505.

It is not a de Polignac number, because 505647 - 2² = 505643 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 505647.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 505647.

It is not an unprimeable number, because it can be changed into a prime (505643) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1308 + ... + 1649.

It is an arithmetic number, because the mean of its divisors is an integer number (64090).

2⁵⁰⁵⁶⁴⁷ is an apocalyptic number.

505647 is a gapful number since it is divisible by the number (57) formed by its first and last digit.

505647 is a deficient number, since it is larger than the sum of its proper divisors (263433).

505647 is a wasteful number, since it uses less digits than its factorization.

505647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2982 (or 2979 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 505647 is about 711.0886020743. The cubic root of 505647 is about 79.6677365060.

The spelling of 505647 in words is "five hundred five thousand, six hundred forty-seven".