3139 has 4 divisors (see below), whose sum is σ = 3256. Its totient is φ = 3024.
The previous prime is 3137. The next prime is 3163. The reversal of 3139 is 9313.
It is a happy number.
It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9313 = 67 ⋅139.
It is a cyclic number.
It is not a de Polignac number, because 3139 - 21 = 3137 is a prime.
It is a Duffinian number.
It is a nialpdrome in base 16.
It is not an unprimeable number, because it can be changed into a prime (3137) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (5) of ones.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7 + ... + 79.
It is an arithmetic number, because the mean of its divisors is an integer number (814).
23139 is an apocalyptic number.
3139 is a deficient number, since it is larger than the sum of its proper divisors (117).
3139 is an equidigital number, since it uses as much as digits as its factorization.
3139 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 116.
The product of its digits is 81, while the sum is 16.
The square root of 3139 is about 56.0267793113. The cubic root of 3139 is about 14.6418888343.
The spelling of 3139 in words is "three thousand, one hundred thirty-nine".
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