139443 has 8 divisors (see below), whose sum is σ = 189648. Its totient is φ = 91104.

The previous prime is 139439. The next prime is 139457. The reversal of 139443 is 344931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 139443 - 2² = 139439 is a prime.

It is not an unprimeable number, because it can be changed into a prime (139423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 280 + ... + 597.

It is an arithmetic number, because the mean of its divisors is an integer number (23706).

2¹³⁹⁴⁴³ is an apocalyptic number.

139443 is a deficient number, since it is larger than the sum of its proper divisors (50205).

139443 is an equidigital number, since it uses as much as digits as its factorization.

139443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 933.

The product of its digits is 1296, while the sum is 24.

The square root of 139443 is about 373.4206743071. The cubic root of 139443 is about 51.8559871293.

The spelling of 139443 in words is "one hundred thirty-nine thousand, four hundred forty-three".