133243289 has 2 divisors, whose sum is σ = 133243290. Its totient is φ = 133243288.

The previous prime is 133243277. The next prime is 133243307. The reversal of 133243289 is 982342331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 132066064 + 1177225 = 11492^2 + 1085^2 .

It is a cyclic number.

It is not a de Polignac number, because 133243289 - 2⁴ = 133243273 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (133243249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66621644 + 66621645.

It is an arithmetic number, because the mean of its divisors is an integer number (66621645).

Almost surely, 2^133243289 is an apocalyptic number.

It is an amenable number.

133243289 is a deficient number, since it is larger than the sum of its proper divisors (1).

133243289 is an equidigital number, since it uses as much as digits as its factorization.

133243289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 35.

The square root of 133243289 is about 11543.1056912774. The cubic root of 133243289 is about 510.7579259943.

The spelling of 133243289 in words is "one hundred thirty-three million, two hundred forty-three thousand, two hundred eighty-nine".