139513685 has 8 divisors (see below), whose sum is σ = 167492256. Its totient is φ = 111560400.

The previous prime is 139513681. The next prime is 139513697. The reversal of 139513685 is 586315931.

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

It is not a de Polignac number, because 139513685 - 2² = 139513681 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 (139513681) 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 7 ways as a sum of consecutive naturals, for example, 9362 + ... + 19148.

It is an arithmetic number, because the mean of its divisors is an integer number (20936532).

Almost surely, 2^139513685 is an apocalyptic number.

It is an amenable number.

139513685 is a deficient number, since it is larger than the sum of its proper divisors (27978571).

139513685 is an equidigital number, since it uses as much as digits as its factorization.

139513685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12643.

The product of its digits is 97200, while the sum is 41.

The square root of 139513685 is about 11811.5911290562. The cubic root of 139513685 is about 518.6474774895.

The spelling of 139513685 in words is "one hundred thirty-nine million, five hundred thirteen thousand, six hundred eighty-five".