139147 has 4 divisors (see below), whose sum is σ = 139896. Its totient is φ = 138400.

The previous prime is 139133. The next prime is 139169. The reversal of 139147 is 741931.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-139147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139177) 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, 147 + ... + 547.

It is an arithmetic number, because the mean of its divisors is an integer number (34974).

2¹³⁹¹⁴⁷ is an apocalyptic number.

139147 is a deficient number, since it is larger than the sum of its proper divisors (749).

139147 is an equidigital number, since it uses as much as digits as its factorization.

139147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 748.

The product of its digits is 756, while the sum is 25.

The square root of 139147 is about 373.0241279060. The cubic root of 139147 is about 51.8192690297.

The spelling of 139147 in words is "one hundred thirty-nine thousand, one hundred forty-seven".