138513338 has 8 divisors (see below), whose sum is σ = 214934580. Its totient is φ = 66868480.

The previous prime is 138513313. The next prime is 138513341. The reversal of 138513338 is 833315831.

It can be written as a sum of positive squares in 2 ways, for example, as 121066009 + 17447329 = 11003^2 + 4177^2 .

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

It is a Curzon number.

It is a plaindrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 138513298 and 138513307.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1194023 + ... + 1194138.

Almost surely, 2^138513338 is an apocalyptic number.

138513338 is a deficient number, since it is larger than the sum of its proper divisors (76421242).

138513338 is a wasteful number, since it uses less digits than its factorization.

138513338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2388192.

The product of its digits is 25920, while the sum is 35.

The square root of 138513338 is about 11769.1689596165. The cubic root of 138513338 is about 517.4048934109.

The spelling of 138513338 in words is "one hundred thirty-eight million, five hundred thirteen thousand, three hundred thirty-eight".