139047 has 4 divisors (see below), whose sum is σ = 185400. Its totient is φ = 92696.

The previous prime is 139033. The next prime is 139067. The reversal of 139047 is 740931.

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

It is a cyclic number.

It is not a de Polignac number, because 139047 - 2¹¹ = 136999 is a prime.

It is a D-number.

139047 is a lucky number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 139047.

It is not an unprimeable number, because it can be changed into a prime (139067) 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, 23172 + ... + 23177.

It is an arithmetic number, because the mean of its divisors is an integer number (46350).

2¹³⁹⁰⁴⁷ is an apocalyptic number.

139047 is a deficient number, since it is larger than the sum of its proper divisors (46353).

139047 is an equidigital number, since it uses as much as digits as its factorization.

139047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46352.

The product of its (nonzero) digits is 756, while the sum is 24.

The square root of 139047 is about 372.8900642281. The cubic root of 139047 is about 51.8068524995.

Adding to 139047 its reverse (740931), we get a palindrome (879978).

The spelling of 139047 in words is "one hundred thirty-nine thousand, forty-seven".