138818333 has 8 divisors (see below), whose sum is σ = 144155256. Its totient is φ = 133574400.

The previous prime is 138818299. The next prime is 138818357. The reversal of 138818333 is 333818831.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 6959044 + 131859289 = 2638^2 + 11483^2 .

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 138818333 - 2²² = 134624029 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 (138818033) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20198 + ... + 26183.

It is an arithmetic number, because the mean of its divisors is an integer number (18019407).

Almost surely, 2^138818333 is an apocalyptic number.

It is an amenable number.

138818333 is a deficient number, since it is larger than the sum of its proper divisors (5336923).

138818333 is an equidigital number, since it uses as much as digits as its factorization.

138818333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46495.

The product of its digits is 41472, while the sum is 38.

The square root of 138818333 is about 11782.1192066623. The cubic root of 138818333 is about 517.7843760514.

The spelling of 138818333 in words is "one hundred thirty-eight million, eight hundred eighteen thousand, three hundred thirty-three".