139768 has 8 divisors (see below), whose sum is σ = 262080. Its totient is φ = 69880.

The previous prime is 139759. The next prime is 139787. The reversal of 139768 is 867931.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

139768 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8728 + ... + 8743.

It is an arithmetic number, because the mean of its divisors is an integer number (32760).

2¹³⁹⁷⁶⁸ is an apocalyptic number.

It is an amenable number.

139768 is a deficient number, since it is larger than the sum of its proper divisors (122312).

139768 is a wasteful number, since it uses less digits than its factorization.

139768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17477 (or 17473 counting only the distinct ones).

The product of its digits is 9072, while the sum is 34.

The square root of 139768 is about 373.8555870921. The cubic root of 139768 is about 51.8962428120.

The spelling of 139768 in words is "one hundred thirty-nine thousand, seven hundred sixty-eight".