83139 has 16 divisors (see below), whose sum is σ = 131328. Its totient is φ = 45792.
The previous prime is 83137. The next prime is 83177. The reversal of 83139 is 93138.
It is not a de Polignac number, because 83139 - 21 = 83137 is a prime.
It is an Ulam number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (83137) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (7) of ones.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 724 + ... + 830.
It is an arithmetic number, because the mean of its divisors is an integer number (8208).
283139 is an apocalyptic number.
83139 is a deficient number, since it is larger than the sum of its proper divisors (48189).
83139 is a wasteful number, since it uses less digits than its factorization.
83139 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 154.
The product of its digits is 648, while the sum is 24.
The square root of 83139 is about 288.3383429237. The cubic root of 83139 is about 43.6450436489.
Subtracting 83139 from its reverse (93138), we obtain a palindrome (9999).
It can be divided in two parts, 83 and 139, that added together give a palindrome (222).
The spelling of 83139 in words is "eighty-three thousand, one hundred thirty-nine".
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