138720333 has 8 divisors (see below), whose sum is σ = 186139168. Its totient is φ = 91890864.

The previous prime is 138720331. The next prime is 138720371. The reversal of 138720333 is 333027831.

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

It is not a de Polignac number, because 138720333 - 2¹ = 138720331 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 138720333.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138720331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146791 + ... + 147732.

It is an arithmetic number, because the mean of its divisors is an integer number (23267396).

Almost surely, 2^138720333 is an apocalyptic number.

It is an amenable number.

138720333 is a deficient number, since it is larger than the sum of its proper divisors (47418835).

138720333 is a wasteful number, since it uses less digits than its factorization.

138720333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294683.

The product of its (nonzero) digits is 9072, while the sum is 30.

The square root of 138720333 is about 11777.9596280510. The cubic root of 138720333 is about 517.6625025850.

The spelling of 138720333 in words is "one hundred thirty-eight million, seven hundred twenty thousand, three hundred thirty-three".