138890333 has 2 divisors, whose sum is σ = 138890334. Its totient is φ = 138890332.

The previous prime is 138890317. The next prime is 138890347. The reversal of 138890333 is 333098831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79245604 + 59644729 = 8902^2 + 7723^2 .

It is a cyclic number.

It is not a de Polignac number, because 138890333 - 2⁴ = 138890317 is a prime.

It is a Chen prime.

It is equal to p_7852970 and since 138890333 and 7852970 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138890363) 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 as a sum of consecutive naturals, namely, 69445166 + 69445167.

It is an arithmetic number, because the mean of its divisors is an integer number (69445167).

Almost surely, 2^138890333 is an apocalyptic number.

It is an amenable number.

138890333 is a deficient number, since it is larger than the sum of its proper divisors (1).

138890333 is an equidigital number, since it uses as much as digits as its factorization.

138890333 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 138890333 is about 11785.1742880621. The cubic root of 138890333 is about 517.8738791950.

The spelling of 138890333 in words is "one hundred thirty-eight million, eight hundred ninety thousand, three hundred thirty-three".