139684 has 12 divisors (see below), whose sum is σ = 249984. Its totient is φ = 68264.

The previous prime is 139681. The next prime is 139697. The reversal of 139684 is 486931.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 184 + ... + 559.

It is an arithmetic number, because the mean of its divisors is an integer number (20832).

2¹³⁹⁶⁸⁴ is an apocalyptic number.

It is an amenable number.

139684 is a deficient number, since it is larger than the sum of its proper divisors (110300).

139684 is a wasteful number, since it uses less digits than its factorization.

139684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 794 (or 792 counting only the distinct ones).

The product of its digits is 5184, while the sum is 31.

The square root of 139684 is about 373.7432273634. The cubic root of 139684 is about 51.8858442515.

The spelling of 139684 in words is "one hundred thirty-nine thousand, six hundred eighty-four".