139988 has 12 divisors (see below), whose sum is σ = 248640. Its totient is φ = 68952.

The previous prime is 139987. The next prime is 139991. The reversal of 139988 is 889931.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139981) 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 3 ways as a sum of consecutive naturals, for example, 95 + ... + 537.

It is an arithmetic number, because the mean of its divisors is an integer number (20720).

2¹³⁹⁹⁸⁸ is an apocalyptic number.

It is an amenable number.

139988 is a deficient number, since it is larger than the sum of its proper divisors (108652).

139988 is a wasteful number, since it uses less digits than its factorization.

139988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526 (or 524 counting only the distinct ones).

The product of its digits is 15552, while the sum is 38.

The square root of 139988 is about 374.1497026592. The cubic root of 139988 is about 51.9234574064.

It can be divided in two parts, 13 and 9988, that added together give a palindrome (10001).

The spelling of 139988 in words is "one hundred thirty-nine thousand, nine hundred eighty-eight".