139103985 has 16 divisors (see below), whose sum is σ = 223689600. Its totient is φ = 73814400.

The previous prime is 139103983. The next prime is 139104061. The reversal of 139103985 is 589301931.

It is not a de Polignac number, because 139103985 - 2¹ = 139103983 is a prime.

It is not an unprimeable number, because it can be changed into a prime (139103983) 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, 20316 + ... + 26285.

It is an arithmetic number, because the mean of its divisors is an integer number (13980600).

Almost surely, 2^139103985 is an apocalyptic number.

139103985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

139103985 is a deficient number, since it is larger than the sum of its proper divisors (84585615).

139103985 is a wasteful number, since it uses less digits than its factorization.

139103985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46808.

The product of its (nonzero) digits is 29160, while the sum is 39.

The square root of 139103985 is about 11794.2352443895. The cubic root of 139103985 is about 518.1392878857.

The spelling of 139103985 in words is "one hundred thirty-nine million, one hundred three thousand, nine hundred eighty-five".