139659 has 8 divisors (see below), whose sum is σ = 200592. Its totient is φ = 85920.

The previous prime is 139627. The next prime is 139661. The reversal of 139659 is 956931.

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

It is not a de Polignac number, because 139659 - 2⁵ = 139627 is a prime.

It is a d-powerful number, because it can be written as 1 + 3⁷ + 6³ + 9² + 5⁷ + 9⁵ .

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 139659.

It is not an unprimeable number, because it can be changed into a prime (139609) 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, 1752 + ... + 1829.

It is an arithmetic number, because the mean of its divisors is an integer number (25074).

2¹³⁹⁶⁵⁹ is an apocalyptic number.

139659 is a deficient number, since it is larger than the sum of its proper divisors (60933).

139659 is a wasteful number, since it uses less digits than its factorization.

139659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3597.

The product of its digits is 7290, while the sum is 33.

The square root of 139659 is about 373.7097804447. The cubic root of 139659 is about 51.8827486369.

The spelling of 139659 in words is "one hundred thirty-nine thousand, six hundred fifty-nine".