139479 has 8 divisors (see below), whose sum is σ = 195840. Its totient is φ = 88056.

The previous prime is 139459. The next prime is 139483. The reversal of 139479 is 974931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 139479 - 2⁹ = 138967 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1167 + ... + 1280.

It is an arithmetic number, because the mean of its divisors is an integer number (24480).

2¹³⁹⁴⁷⁹ is an apocalyptic number.

139479 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

139479 is a deficient number, since it is larger than the sum of its proper divisors (56361).

139479 is a wasteful number, since it uses less digits than its factorization.

139479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2469.

The product of its digits is 6804, while the sum is 33.

The square root of 139479 is about 373.4688742051. The cubic root of 139479 is about 51.8604492988.

The spelling of 139479 in words is "one hundred thirty-nine thousand, four hundred seventy-nine".