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6139 = 7877
BaseRepresentation
bin1011111111011
322102101
41133323
5144024
644231
723620
oct13773
98371
106139
114681
123677
132a43
142347
151c44
hex17fb

6139 has 4 divisors (see below), whose sum is σ = 7024. Its totient is φ = 5256.

The previous prime is 6133. The next prime is 6143. The reversal of 6139 is 9316.

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 6139 - 23 = 6131 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12 and base 14.

It is not an unprimeable number, because it can be changed into a prime (6131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 432 + ... + 445.

It is an arithmetic number, because the mean of its divisors is an integer number (1756).

26139 is an apocalyptic number.

6139 is a deficient number, since it is larger than the sum of its proper divisors (885).

6139 is an equidigital number, since it uses as much as digits as its factorization.

6139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 884.

The product of its digits is 162, while the sum is 19.

The square root of 6139 is about 78.3517708798. The cubic root of 6139 is about 18.3104581547.

It can be divided in two parts, 61 and 39, that added together give a square (100 = 102).

The spelling of 6139 in words is "six thousand, one hundred thirty-nine".

Divisors: 1 7 877 6139