138665373 has 16 divisors (see below), whose sum is σ = 230509056. Its totient is φ = 72033840.

The previous prime is 138665339. The next prime is 138665377. The reversal of 138665373 is 373566831.

It is not a de Polignac number, because 138665373 - 2⁶ = 138665309 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138665377) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 299911 + ... + 300372.

It is an arithmetic number, because the mean of its divisors is an integer number (14406816).

Almost surely, 2^138665373 is an apocalyptic number.

It is an amenable number.

138665373 is a deficient number, since it is larger than the sum of its proper divisors (91843683).

138665373 is a wasteful number, since it uses less digits than its factorization.

138665373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600304.

The product of its digits is 272160, while the sum is 42.

The square root of 138665373 is about 11775.6262253861. The cubic root of 138665373 is about 517.5941288321.

The spelling of 138665373 in words is "one hundred thirty-eight million, six hundred sixty-five thousand, three hundred seventy-three".