133397389 has 2 divisors, whose sum is σ = 133397390. Its totient is φ = 133397388.

The previous prime is 133397357. The next prime is 133397399. The reversal of 133397389 is 983793331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68062500 + 65334889 = 8250^2 + 8083^2 .

It is a cyclic number.

It is not a de Polignac number, because 133397389 - 2⁵ = 133397357 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133397399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66698694 + 66698695.

It is an arithmetic number, because the mean of its divisors is an integer number (66698695).

Almost surely, 2^133397389 is an apocalyptic number.

It is an amenable number.

133397389 is a deficient number, since it is larger than the sum of its proper divisors (1).

133397389 is an equidigital number, since it uses as much as digits as its factorization.

133397389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 367416, while the sum is 46.

The square root of 133397389 is about 11549.7787424695. The cubic root of 133397389 is about 510.9547526007.

The spelling of 133397389 in words is "one hundred thirty-three million, three hundred ninety-seven thousand, three hundred eighty-nine".