139947 has 4 divisors (see below), whose sum is σ = 186600. Its totient is φ = 93296.

The previous prime is 139943. The next prime is 139967. The reversal of 139947 is 749931.

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 139947 - 2² = 139943 is a prime.

It is a D-number.

It is a plaindrome in base 16.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 139947.

It is not an unprimeable number, because it can be changed into a prime (139943) 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, 23322 + ... + 23327.

It is an arithmetic number, because the mean of its divisors is an integer number (46650).

2¹³⁹⁹⁴⁷ is an apocalyptic number.

139947 is a deficient number, since it is larger than the sum of its proper divisors (46653).

139947 is an equidigital number, since it uses as much as digits as its factorization.

139947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46652.

The product of its digits is 6804, while the sum is 33.

The square root of 139947 is about 374.0949077440. The cubic root of 139947 is about 51.9183877584.

The spelling of 139947 in words is "one hundred thirty-nine thousand, nine hundred forty-seven".