133219409 has 2 divisors, whose sum is σ = 133219410. Its totient is φ = 133219408.

The previous prime is 133219391. The next prime is 133219421. The reversal of 133219409 is 904912331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 94031809 + 39187600 = 9697^2 + 6260^2 .

It is a cyclic number.

It is not a de Polignac number, because 133219409 - 2⁸ = 133219153 is a prime.

It is not a weakly prime, because it can be changed into another prime (133219309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66609704 + 66609705.

It is an arithmetic number, because the mean of its divisors is an integer number (66609705).

Almost surely, 2^133219409 is an apocalyptic number.

It is an amenable number.

133219409 is a deficient number, since it is larger than the sum of its proper divisors (1).

133219409 is an equidigital number, since it uses as much as digits as its factorization.

133219409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 133219409 is about 11542.0712612598. The cubic root of 133219409 is about 510.7274113167.

The spelling of 133219409 in words is "one hundred thirty-three million, two hundred nineteen thousand, four hundred nine".