138917474 has 8 divisors (see below), whose sum is σ = 219343440. Its totient is φ = 65802996.

The previous prime is 138917473. The next prime is 138917491. The reversal of 138917474 is 474719831.

138917474 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is not an unprimeable number, because it can be changed into a prime (138917473) 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 3 ways as a sum of consecutive naturals, for example, 1827824 + ... + 1827899.

It is an arithmetic number, because the mean of its divisors is an integer number (27417930).

Almost surely, 2^138917474 is an apocalyptic number.

138917474 is a deficient number, since it is larger than the sum of its proper divisors (80425966).

138917474 is a wasteful number, since it uses less digits than its factorization.

138917474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3655744.

The product of its digits is 169344, while the sum is 44.

The square root of 138917474 is about 11786.3257209361. The cubic root of 138917474 is about 517.9076101231.

The spelling of 138917474 in words is "one hundred thirty-eight million, nine hundred seventeen thousand, four hundred seventy-four".