133448561 has 2 divisors, whose sum is σ = 133448562. Its totient is φ = 133448560.

The previous prime is 133448527. The next prime is 133448597. The reversal of 133448561 is 165844331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 113018161 + 20430400 = 10631^2 + 4520^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133448561 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (133444561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66724280 + 66724281.

It is an arithmetic number, because the mean of its divisors is an integer number (66724281).

Almost surely, 2^133448561 is an apocalyptic number.

It is an amenable number.

133448561 is a deficient number, since it is larger than the sum of its proper divisors (1).

133448561 is an equidigital number, since it uses as much as digits as its factorization.

133448561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34560, while the sum is 35.

The square root of 133448561 is about 11551.9938105939. The cubic root of 133448561 is about 511.0200793016.

The spelling of 133448561 in words is "one hundred thirty-three million, four hundred forty-eight thousand, five hundred sixty-one".