139120385 has 4 divisors (see below), whose sum is σ = 166944468. Its totient is φ = 111296304.

The previous prime is 139120381. The next prime is 139120403. The reversal of 139120385 is 583021931.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 95335696 + 43784689 = 9764^2 + 6617^2 .

It is a cyclic number.

It is not a de Polignac number, because 139120385 - 2² = 139120381 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (139120381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13912034 + ... + 13912043.

It is an arithmetic number, because the mean of its divisors is an integer number (41736117).

Almost surely, 2^139120385 is an apocalyptic number.

It is an amenable number.

139120385 is a deficient number, since it is larger than the sum of its proper divisors (27824083).

139120385 is an equidigital number, since it uses as much as digits as its factorization.

139120385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27824082.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 139120385 is about 11794.9304788116. The cubic root of 139120385 is about 518.1596495128.

The spelling of 139120385 in words is "one hundred thirty-nine million, one hundred twenty thousand, three hundred eighty-five".