139193 has 4 divisors (see below), whose sum is σ = 140580. Its totient is φ = 137808.

The previous prime is 139187. The next prime is 139199. The reversal of 139193 is 391931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 391931 = 337 ⋅1163.

It is an interprime number because it is at equal distance from previous prime (139187) and next prime (139199).

It can be written as a sum of positive squares in 2 ways, for example, as 94249 + 44944 = 307^2 + 212^2 .

It is a cyclic number.

It is not a de Polignac number, because 139193 - 2⁴ = 139177 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (139199) 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, 530 + ... + 747.

It is an arithmetic number, because the mean of its divisors is an integer number (35145).

2¹³⁹¹⁹³ is an apocalyptic number.

It is an amenable number.

139193 is a deficient number, since it is larger than the sum of its proper divisors (1387).

139193 is a wasteful number, since it uses less digits than its factorization.

139193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1386.

The product of its digits is 729, while the sum is 26.

The square root of 139193 is about 373.0857810209. The cubic root of 139193 is about 51.8249786359.

The spelling of 139193 in words is "one hundred thirty-nine thousand, one hundred ninety-three".