138770085 has 16 divisors (see below), whose sum is σ = 226757376. Its totient is φ = 72435648.

The previous prime is 138770083. The next prime is 138770089. The reversal of 138770085 is 580077831.

It is not a de Polignac number, because 138770085 - 2¹ = 138770083 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138770081) 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, 97714 + ... + 99123.

It is an arithmetic number, because the mean of its divisors is an integer number (14172336).

Almost surely, 2^138770085 is an apocalyptic number.

138770085 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

138770085 is a deficient number, since it is larger than the sum of its proper divisors (87987291).

138770085 is a wasteful number, since it uses less digits than its factorization.

138770085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196892.

The product of its (nonzero) digits is 47040, while the sum is 39.

The square root of 138770085 is about 11780.0715193075. The cubic root of 138770085 is about 517.7243816811.

The spelling of 138770085 in words is "one hundred thirty-eight million, seven hundred seventy thousand, eighty-five".