133838389 has 2 divisors, whose sum is σ = 133838390. Its totient is φ = 133838388.

The previous prime is 133838371. The next prime is 133838407. The reversal of 133838389 is 983838331.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (133838371) and next prime (133838407).

It can be written as a sum of positive squares in only one way, i.e., 80694289 + 53144100 = 8983^2 + 7290^2 .

It is a cyclic number.

It is not a de Polignac number, because 133838389 - 2⁹ = 133837877 is a prime.

It is a plaindrome in base 14.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133838339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66919194 + 66919195.

It is an arithmetic number, because the mean of its divisors is an integer number (66919195).

Almost surely, 2^133838389 is an apocalyptic number.

It is an amenable number.

133838389 is a deficient number, since it is larger than the sum of its proper divisors (1).

133838389 is an equidigital number, since it uses as much as digits as its factorization.

133838389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 373248, while the sum is 46.

The square root of 133838389 is about 11568.8542647922. The cubic root of 133838389 is about 511.5171903776.

The spelling of 133838389 in words is "one hundred thirty-three million, eight hundred thirty-eight thousand, three hundred eighty-nine".