Search a number
-
+
505423 = 673751
BaseRepresentation
bin1111011011001001111
3221200022101
41323121033
5112133143
614455531
74203352
oct1733117
9850271
10505423
11315806
122045a7
13149089
14d2299
159eb4d
hex7b64f

505423 has 4 divisors (see below), whose sum is σ = 506848. Its totient is φ = 504000.

The previous prime is 505411. The next prime is 505429. The reversal of 505423 is 324505.

It is a happy 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, and also an emirpimes, since its reverse is a distinct semiprime: 324505 = 564901.

It is a cyclic number.

It is not a de Polignac number, because 505423 - 217 = 374351 is a prime.

It is a Duffinian number.

505423 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 505423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505429) 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 in 3 ways as a sum of consecutive naturals, for example, 298 + ... + 1048.

It is an arithmetic number, because the mean of its divisors is an integer number (126712).

2505423 is an apocalyptic number.

505423 is a deficient number, since it is larger than the sum of its proper divisors (1425).

505423 is an equidigital number, since it uses as much as digits as its factorization.

505423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1424.

The product of its (nonzero) digits is 600, while the sum is 19.

The square root of 505423 is about 710.9310796413. The cubic root of 505423 is about 79.6559705844.

Adding to 505423 its reverse (324505), we get a palindrome (829928).

The spelling of 505423 in words is "five hundred five thousand, four hundred twenty-three".

Divisors: 1 673 751 505423