133488881 has 2 divisors, whose sum is σ = 133488882. Its totient is φ = 133488880.

The previous prime is 133488871. The next prime is 133488893. The reversal of 133488881 is 188884331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81288256 + 52200625 = 9016^2 + 7225^2 .

It is a cyclic number.

It is not a de Polignac number, because 133488881 - 2¹⁰ = 133487857 is a prime.

It is a super-2 number, since 2×133488881² = 35638562701264322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (133488871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66744440 + 66744441.

It is an arithmetic number, because the mean of its divisors is an integer number (66744441).

Almost surely, 2^133488881 is an apocalyptic number.

It is an amenable number.

133488881 is a deficient number, since it is larger than the sum of its proper divisors (1).

133488881 is an equidigital number, since it uses as much as digits as its factorization.

133488881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 147456, while the sum is 44.

The square root of 133488881 is about 11553.7388320838. The cubic root of 133488881 is about 511.0715404655.

The spelling of 133488881 in words is "one hundred thirty-three million, four hundred eighty-eight thousand, eight hundred eighty-one".