138031773 has 16 divisors (see below), whose sum is σ = 201792000. Its totient is φ = 83231280.

The previous prime is 138031771. The next prime is 138031781. The reversal of 138031773 is 377130831.

It is not a de Polignac number, because 138031773 - 2¹ = 138031771 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138031771) 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, 3943 + ... + 17076.

It is an arithmetic number, because the mean of its divisors is an integer number (12612000).

Almost surely, 2^138031773 is an apocalyptic number.

It is an amenable number.

138031773 is a deficient number, since it is larger than the sum of its proper divisors (63760227).

138031773 is a wasteful number, since it uses less digits than its factorization.

138031773 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21232.

The product of its (nonzero) digits is 10584, while the sum is 33.

The square root of 138031773 is about 11748.6923953264. The cubic root of 138031773 is about 516.8045820287.

It can be divided in two parts, 13803 and 1773, that added together give a triangular number (15576 = T₁₇₆).

The spelling of 138031773 in words is "one hundred thirty-eight million, thirty-one thousand, seven hundred seventy-three".