133335989 has 2 divisors, whose sum is σ = 133335990. Its totient is φ = 133335988.

The previous prime is 133335971. The next prime is 133336001. The reversal of 133335989 is 989533331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72760900 + 60575089 = 8530^2 + 7783^2 .

It is a cyclic number.

It is not a de Polignac number, because 133335989 - 2¹² = 133331893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133335919) 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, 66667994 + 66667995.

It is an arithmetic number, because the mean of its divisors is an integer number (66667995).

Almost surely, 2^133335989 is an apocalyptic number.

It is an amenable number.

133335989 is a deficient number, since it is larger than the sum of its proper divisors (1).

133335989 is an equidigital number, since it uses as much as digits as its factorization.

133335989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 262440, while the sum is 44.

The square root of 133335989 is about 11547.1203769598. The cubic root of 133335989 is about 510.8763466772.

The spelling of 133335989 in words is "one hundred thirty-three million, three hundred thirty-five thousand, nine hundred eighty-nine".