139187 has 2 divisors, whose sum is σ = 139188. Its totient is φ = 139186.

The previous prime is 139177. The next prime is 139199. The reversal of 139187 is 781931.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 139187 - 2⁶ = 139123 is a prime.

It is a Chen prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 139187.

It is not a weakly prime, because it can be changed into another prime (139177) 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 as a sum of consecutive naturals, namely, 69593 + 69594.

It is an arithmetic number, because the mean of its divisors is an integer number (69594).

2¹³⁹¹⁸⁷ is an apocalyptic number.

139187 is a deficient number, since it is larger than the sum of its proper divisors (1).

139187 is an equidigital number, since it uses as much as digits as its factorization.

139187 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1512, while the sum is 29.

The square root of 139187 is about 373.0777398881. The cubic root of 139187 is about 51.8242339760.

The spelling of 139187 in words is "one hundred thirty-nine thousand, one hundred eighty-seven".