133340881 has 2 divisors, whose sum is σ = 133340882. Its totient is φ = 133340880.

The previous prime is 133340863. The next prime is 133340887. The reversal of 133340881 is 188043331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81270225 + 52070656 = 9015^2 + 7216^2 .

It is a cyclic number.

It is not a de Polignac number, because 133340881 - 2¹⁵ = 133308113 is a prime.

It is a super-2 number, since 2×133340881² = 35559581091712322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (133340887) 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, 66670440 + 66670441.

It is an arithmetic number, because the mean of its divisors is an integer number (66670441).

Almost surely, 2^133340881 is an apocalyptic number.

It is an amenable number.

133340881 is a deficient number, since it is larger than the sum of its proper divisors (1).

133340881 is an equidigital number, since it uses as much as digits as its factorization.

133340881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 133340881 is about 11547.3322027211. The cubic root of 133340881 is about 510.8825944941.

The spelling of 133340881 in words is "one hundred thirty-three million, three hundred forty thousand, eight hundred eighty-one".