138864333 has 4 divisors (see below), whose sum is σ = 185152448. Its totient is φ = 92576220.

The previous prime is 138864307. The next prime is 138864343. The reversal of 138864333 is 333468831.

138864333 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 138864333 - 2⁶ = 138864269 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 138864291 and 138864300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138864343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23144053 + ... + 23144058.

It is an arithmetic number, because the mean of its divisors is an integer number (46288112).

Almost surely, 2^138864333 is an apocalyptic number.

It is an amenable number.

138864333 is a deficient number, since it is larger than the sum of its proper divisors (46288115).

138864333 is an equidigital number, since it uses as much as digits as its factorization.

138864333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46288114.

The product of its digits is 124416, while the sum is 39.

The square root of 138864333 is about 11784.0711555897. The cubic root of 138864333 is about 517.8415621843.

The spelling of 138864333 in words is "one hundred thirty-eight million, eight hundred sixty-four thousand, three hundred thirty-three".