13139 has 4 divisors (see below), whose sum is σ = 15024. Its totient is φ = 11256.

The previous prime is 13127. The next prime is 13147. The reversal of 13139 is 93131.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 13139 - 2¹² = 9043 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 7 and base 11.

It is not an unprimeable number, because it can be changed into a prime (13109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 932 + ... + 945.

It is an arithmetic number, because the mean of its divisors is an integer number (3756).

2¹³¹³⁹ is an apocalyptic number.

13139 is a deficient number, since it is larger than the sum of its proper divisors (1885).

13139 is an equidigital number, since it uses as much as digits as its factorization.

13139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1884.

The product of its digits is 81, while the sum is 17.

The square root of 13139 is about 114.6254770982. The cubic root of 13139 is about 23.5968539328.

The spelling of 13139 in words is "thirteen thousand, one hundred thirty-nine".