139844 has 6 divisors (see below), whose sum is σ = 244734. Its totient is φ = 69920.

The previous prime is 139837. The next prime is 139861. The reversal of 139844 is 448931.

It can be written as a sum of positive squares in only one way, i.e., 114244 + 25600 = 338^2 + 160^2 .

It is a plaindrome in base 16.

It is a zygodrome in base 16.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 139844.

It is an unprimeable number.

139844 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 as a sum of consecutive naturals, namely, 17477 + ... + 17484.

It is an arithmetic number, because the mean of its divisors is an integer number (40789).

2¹³⁹⁸⁴⁴ is an apocalyptic number.

It is an amenable number.

139844 is a deficient number, since it is larger than the sum of its proper divisors (104890).

139844 is a wasteful number, since it uses less digits than its factorization.

139844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34965 (or 34963 counting only the distinct ones).

The product of its digits is 3456, while the sum is 29.

The square root of 139844 is about 373.9572168043. The cubic root of 139844 is about 51.9056474439.

The spelling of 139844 in words is "one hundred thirty-nine thousand, eight hundred forty-four".