139679 has 4 divisors (see below), whose sum is σ = 145776. Its totient is φ = 133584.

The previous prime is 139663. The next prime is 139681. The reversal of 139679 is 976931.

139679 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 976931 = 173 ⋅5647.

It is not a de Polignac number, because 139679 - 2⁴ = 139663 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139609) 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, 3014 + ... + 3059.

It is an arithmetic number, because the mean of its divisors is an integer number (36444).

2¹³⁹⁶⁷⁹ is an apocalyptic number.

139679 is a deficient number, since it is larger than the sum of its proper divisors (6097).

139679 is an equidigital number, since it uses as much as digits as its factorization.

139679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6096.

The product of its digits is 10206, while the sum is 35.

The square root of 139679 is about 373.7365382191. The cubic root of 139679 is about 51.8852251581.

It can be divided in two parts, 139 and 679, that added together give a palindrome (818).

The spelling of 139679 in words is "one hundred thirty-nine thousand, six hundred seventy-nine".