133438489 has 2 divisors, whose sum is σ = 133438490. Its totient is φ = 133438488.

The previous prime is 133438469. The next prime is 133438493. The reversal of 133438489 is 984834331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 127509264 + 5929225 = 11292^2 + 2435^2 .

It is a cyclic number.

It is not a de Polignac number, because 133438489 - 2⁹ = 133437977 is a prime.

It is not a weakly prime, because it can be changed into another prime (133438429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66719244 + 66719245.

It is an arithmetic number, because the mean of its divisors is an integer number (66719245).

Almost surely, 2^133438489 is an apocalyptic number.

It is an amenable number.

133438489 is a deficient number, since it is larger than the sum of its proper divisors (1).

133438489 is an equidigital number, since it uses as much as digits as its factorization.

133438489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 248832, while the sum is 43.

The square root of 133438489 is about 11551.5578603061. The cubic root of 133438489 is about 511.0072226031.

The spelling of 133438489 in words is "one hundred thirty-three million, four hundred thirty-eight thousand, four hundred eighty-nine".