139388 has 6 divisors (see below), whose sum is σ = 243936. Its totient is φ = 69692.

The previous prime is 139387. The next prime is 139393. The reversal of 139388 is 883931.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139387) 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 as a sum of consecutive naturals, namely, 17420 + ... + 17427.

It is an arithmetic number, because the mean of its divisors is an integer number (40656).

2¹³⁹³⁸⁸ is an apocalyptic number.

It is an amenable number.

139388 is a deficient number, since it is larger than the sum of its proper divisors (104548).

139388 is a wasteful number, since it uses less digits than its factorization.

139388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34851 (or 34849 counting only the distinct ones).

The product of its digits is 5184, while the sum is 32.

The square root of 139388 is about 373.3470235585. The cubic root of 139388 is about 51.8491684426.

The spelling of 139388 in words is "one hundred thirty-nine thousand, three hundred eighty-eight".