133401784281809 has 2 divisors, whose sum is σ = 133401784281810. Its totient is φ = 133401784281808.

The previous prime is 133401784281749. The next prime is 133401784281839. The reversal of 133401784281809 is 908182487104331.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116141681379025 + 17260102902784 = 10776905^2 + 4154528^2 .

It is a cyclic number.

It is not a de Polignac number, because 133401784281809 - 2⁸ = 133401784281553 is a prime.

It is not a weakly prime, because it can be changed into another prime (133401784281839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66700892140904 + 66700892140905.

It is an arithmetic number, because the mean of its divisors is an integer number (66700892140905).

Almost surely, 2^{133401784281809} is an apocalyptic number.

It is an amenable number.

133401784281809 is a deficient number, since it is larger than the sum of its proper divisors (1).

133401784281809 is an equidigital number, since it uses as much as digits as its factorization.

133401784281809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9289728, while the sum is 59.

The spelling of 133401784281809 in words is "one hundred thirty-three trillion, four hundred one billion, seven hundred eighty-four million, two hundred eighty-one thousand, eight hundred nine".