138470893 has 8 divisors (see below), whose sum is σ = 155932416. Its totient is φ = 121821600.

The previous prime is 138470881. The next prime is 138470897. The reversal of 138470893 is 398074831.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 138470893 - 2¹⁷ = 138339821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138470897) 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 7 ways as a sum of consecutive naturals, for example, 202696 + ... + 203377.

It is an arithmetic number, because the mean of its divisors is an integer number (19491552).

Almost surely, 2^138470893 is an apocalyptic number.

It is an amenable number.

138470893 is a deficient number, since it is larger than the sum of its proper divisors (17461523).

138470893 is a wasteful number, since it uses less digits than its factorization.

138470893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406115.

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 138470893 is about 11767.3655930289. The cubic root of 138470893 is about 517.3520381056.

The spelling of 138470893 in words is "one hundred thirty-eight million, four hundred seventy thousand, eight hundred ninety-three".