139779 has 16 divisors (see below), whose sum is σ = 215040. Its totient is φ = 89640.

The previous prime is 139759. The next prime is 139787. The reversal of 139779 is 977931.

It is not a de Polignac number, because 139779 - 2⁵ = 139747 is a prime.

139779 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (139709) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 754 + ... + 920.

It is an arithmetic number, because the mean of its divisors is an integer number (13440).

2¹³⁹⁷⁷⁹ is an apocalyptic number.

139779 is a deficient number, since it is larger than the sum of its proper divisors (75261).

139779 is a wasteful number, since it uses less digits than its factorization.

139779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207 (or 201 counting only the distinct ones).

The product of its digits is 11907, while the sum is 36.

The square root of 139779 is about 373.8702983656. The cubic root of 139779 is about 51.8976042197.

The spelling of 139779 in words is "one hundred thirty-nine thousand, seven hundred seventy-nine".