138923774 has 8 divisors (see below), whose sum is σ = 227329848. Its totient is φ = 63147160.

The previous prime is 138923761. The next prime is 138923777. The reversal of 138923774 is 477329831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138923777) 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, 3157337 + ... + 3157380.

It is an arithmetic number, because the mean of its divisors is an integer number (28416231).

Almost surely, 2^138923774 is an apocalyptic number.

138923774 is a deficient number, since it is larger than the sum of its proper divisors (88406074).

138923774 is a wasteful number, since it uses less digits than its factorization.

138923774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6314730.

The product of its digits is 254016, while the sum is 44.

The square root of 138923774 is about 11786.5929767681. The cubic root of 138923774 is about 517.9154391565.

The spelling of 138923774 in words is "one hundred thirty-eight million, nine hundred twenty-three thousand, seven hundred seventy-four".