138145773 has 16 divisors (see below), whose sum is σ = 185778176. Its totient is φ = 91309680.

The previous prime is 138145771. The next prime is 138145783. The reversal of 138145773 is 377541831.

It is not a de Polignac number, because 138145773 - 2¹ = 138145771 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 (138145771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 298140 + ... + 298602.

It is an arithmetic number, because the mean of its divisors is an integer number (11611136).

Almost surely, 2^138145773 is an apocalyptic number.

It is an amenable number.

138145773 is a deficient number, since it is larger than the sum of its proper divisors (47632403).

138145773 is a wasteful number, since it uses less digits than its factorization.

138145773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1104.

The product of its digits is 70560, while the sum is 39.

The square root of 138145773 is about 11753.5429977518. The cubic root of 138145773 is about 516.9468186289.

The spelling of 138145773 in words is "one hundred thirty-eight million, one hundred forty-five thousand, seven hundred seventy-three".