139019 has 8 divisors (see below), whose sum is σ = 147312. Its totient is φ = 131040.

The previous prime is 138977. The next prime is 139021. The reversal of 139019 is 910931.

139019 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 139019 - 2⁸ = 138763 is a prime.

It is a super-2 number, since 2×139019² = 38652564722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 138985 and 139003.

It is not an unprimeable number, because it can be changed into a prime (139079) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2249 + ... + 2309.

It is an arithmetic number, because the mean of its divisors is an integer number (18414).

2¹³⁹⁰¹⁹ is an apocalyptic number.

139019 is a deficient number, since it is larger than the sum of its proper divisors (8293).

139019 is an equidigital number, since it uses as much as digits as its factorization.

139019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157.

The product of its (nonzero) digits is 243, while the sum is 23.

The square root of 139019 is about 372.8525177600. The cubic root of 139019 is about 51.8033748043.

The spelling of 139019 in words is "one hundred thirty-nine thousand, nineteen".