138133773 has 6 divisors (see below), whose sum is σ = 199526574. Its totient is φ = 92089176.

The previous prime is 138133771. The next prime is 138133777. The reversal of 138133773 is 377331831.

It can be written as a sum of positive squares in only one way, i.e., 73925604 + 64208169 = 8598^2 + 8013^2 .

It is not a de Polignac number, because 138133773 - 2¹ = 138133771 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138133771) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7674090 + ... + 7674107.

It is an arithmetic number, because the mean of its divisors is an integer number (33254429).

Almost surely, 2^138133773 is an apocalyptic number.

It is an amenable number.

138133773 is a deficient number, since it is larger than the sum of its proper divisors (61392801).

138133773 is a wasteful number, since it uses less digits than its factorization.

138133773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15348203 (or 15348200 counting only the distinct ones).

The product of its digits is 31752, while the sum is 36.

The square root of 138133773 is about 11753.0325022949. The cubic root of 138133773 is about 516.9318500410.

The spelling of 138133773 in words is "one hundred thirty-eight million, one hundred thirty-three thousand, seven hundred seventy-three".