138107773 has 4 divisors (see below), whose sum is σ = 142870140. Its totient is φ = 133345408.

The previous prime is 138107737. The next prime is 138107857. The reversal of 138107773 is 377701831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 377701831 = 13 ⋅29053987.

It can be written as a sum of positive squares in 2 ways, for example, as 103978809 + 34128964 = 10197^2 + 5842^2 .

It is a cyclic number.

It is not a de Polignac number, because 138107773 - 2²⁵ = 104553341 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 (138107173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2381140 + ... + 2381197.

It is an arithmetic number, because the mean of its divisors is an integer number (35717535).

Almost surely, 2^138107773 is an apocalyptic number.

It is an amenable number.

138107773 is a deficient number, since it is larger than the sum of its proper divisors (4762367).

138107773 is an equidigital number, since it uses as much as digits as its factorization.

138107773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4762366.

The product of its (nonzero) digits is 24696, while the sum is 37.

The square root of 138107773 is about 11751.9263527304. The cubic root of 138107773 is about 516.8994151263.

The spelling of 138107773 in words is "one hundred thirty-eight million, one hundred seven thousand, seven hundred seventy-three".