139105679 has 16 divisors (see below), whose sum is σ = 154275840. Its totient is φ = 124755840.

The previous prime is 139105643. The next prime is 139105693. The reversal of 139105679 is 976501931.

It is a cyclic number.

It is not a de Polignac number, because 139105679 - 2¹² = 139101583 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 (139105639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 139874 + ... + 140864.

It is an arithmetic number, because the mean of its divisors is an integer number (9642240).

Almost surely, 2^139105679 is an apocalyptic number.

139105679 is a deficient number, since it is larger than the sum of its proper divisors (15170161).

139105679 is a wasteful number, since it uses less digits than its factorization.

139105679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1390.

The product of its (nonzero) digits is 51030, while the sum is 41.

The square root of 139105679 is about 11794.3070589162. The cubic root of 139105679 is about 518.1413911669.

The spelling of 139105679 in words is "one hundred thirty-nine million, one hundred five thousand, six hundred seventy-nine".