139636 has 12 divisors (see below), whose sum is σ = 279328. Its totient is φ = 59832.

The previous prime is 139627. The next prime is 139661. The reversal of 139636 is 636931.

139636 is an admirable number.

It is a Harshad number since it is a multiple of its sum of digits (28), and also a Moran number because the ratio is a prime number: 4987 = 139636 / (1 + 3 + 9 + 6 + 3 + 6).

It is a congruent number.

It is an unprimeable number.

139636 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 (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2466 + ... + 2521.

2¹³⁹⁶³⁶ is an apocalyptic number.

It is an amenable number.

139636 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

139636 is a wasteful number, since it uses less digits than its factorization.

139636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4998 (or 4996 counting only the distinct ones).

The product of its digits is 2916, while the sum is 28.

The square root of 139636 is about 373.6790066354. The cubic root of 139636 is about 51.8799003451.

The spelling of 139636 in words is "one hundred thirty-nine thousand, six hundred thirty-six".