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50639 = 79641
BaseRepresentation
bin1100010111001111
32120110112
430113033
53110024
61030235
7300431
oct142717
976415
1050639
1135056
122537b
131a084
1414651
151000e
hexc5cf

50639 has 4 divisors (see below), whose sum is σ = 51360. Its totient is φ = 49920.

The previous prime is 50627. The next prime is 50647. The reversal of 50639 is 93605.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 50639 - 28 = 50383 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 242 + ... + 399.

It is an arithmetic number, because the mean of its divisors is an integer number (12840).

250639 is an apocalyptic number.

50639 is a deficient number, since it is larger than the sum of its proper divisors (721).

50639 is an equidigital number, since it uses as much as digits as its factorization.

50639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 720.

The product of its (nonzero) digits is 810, while the sum is 23.

The square root of 50639 is about 225.0311089605. The cubic root of 50639 is about 36.9965908717.

It can be divided in two parts, 506 and 39, that added together give a palindrome (545).

The spelling of 50639 in words is "fifty thousand, six hundred thirty-nine".

Divisors: 1 79 641 50639