139684079 has 8 divisors (see below), whose sum is σ = 142251648. Its totient is φ = 137130840.

The previous prime is 139684063. The next prime is 139684133. The reversal of 139684079 is 970486931.

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

It is a cyclic number.

It is not a de Polignac number, because 139684079 - 2⁴ = 139684063 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139684009) 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, 17174 + ... + 23964.

It is an arithmetic number, because the mean of its divisors is an integer number (17781456).

Almost surely, 2^139684079 is an apocalyptic number.

139684079 is a deficient number, since it is larger than the sum of its proper divisors (2567569).

139684079 is an equidigital number, since it uses as much as digits as its factorization.

139684079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7165.

The product of its (nonzero) digits is 326592, while the sum is 47.

The square root of 139684079 is about 11818.8019274375. The cubic root of 139684079 is about 518.8585403306.

The spelling of 139684079 in words is "one hundred thirty-nine million, six hundred eighty-four thousand, seventy-nine".