107139985 has 4 divisors (see below), whose sum is σ = 128567988. Its totient is φ = 85711984.

The previous prime is 107139971. The next prime is 107139997. The reversal of 107139985 is 589931701.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 589931701 = 331 ⋅1782271.

It can be written as a sum of positive squares in 2 ways, for example, as 14807104 + 92332881 = 3848^2 + 9609^2 .

It is a cyclic number.

It is not a de Polignac number, because 107139985 - 2⁵ = 107139953 is a prime.

It is a super-2 number, since 2×107139985² = 22957952771600450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 10713994 + ... + 10714003.

It is an arithmetic number, because the mean of its divisors is an integer number (32141997).

Almost surely, 2^107139985 is an apocalyptic number.

It is an amenable number.

107139985 is a deficient number, since it is larger than the sum of its proper divisors (21428003).

107139985 is an equidigital number, since it uses as much as digits as its factorization.

107139985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21428002.

The product of its (nonzero) digits is 68040, while the sum is 43.

The square root of 107139985 is about 10350.8446515248. The cubic root of 107139985 is about 474.9528817528.

The spelling of 107139985 in words is "one hundred seven million, one hundred thirty-nine thousand, nine hundred eighty-five".