86139 has 12 divisors (see below), whose sum is σ = 131976. Its totient is φ = 53952.

The previous prime is 86137. The next prime is 86143. The reversal of 86139 is 93168.

86139 = T₆₆ + T₆₇ + ... + T₉₂.

It is not a de Polignac number, because 86139 - 2¹ = 86137 is a prime.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (86131) 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, 129 + ... + 434.

It is an arithmetic number, because the mean of its divisors is an integer number (10998).

2⁸⁶¹³⁹ is an apocalyptic number.

86139 is a deficient number, since it is larger than the sum of its proper divisors (45837).

86139 is a wasteful number, since it uses less digits than its factorization.

86139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 586 (or 583 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 86139 is about 293.4944633209. The cubic root of 86139 is about 44.1638177032.

It can be divided in two parts, 861 and 39, that added together give a square (900 = 30²).

The spelling of 86139 in words is "eighty-six thousand, one hundred thirty-nine".