133544461 has 2 divisors, whose sum is σ = 133544462. Its totient is φ = 133544460.

The previous prime is 133544447. The next prime is 133544513. The reversal of 133544461 is 164445331.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 128391561 + 5152900 = 11331^2 + 2270^2 .

It is a cyclic number.

It is not a de Polignac number, because 133544461 - 2⁵ = 133544429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133544161) 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, 66772230 + 66772231.

It is an arithmetic number, because the mean of its divisors is an integer number (66772231).

Almost surely, 2^133544461 is an apocalyptic number.

It is an amenable number.

133544461 is a deficient number, since it is larger than the sum of its proper divisors (1).

133544461 is an equidigital number, since it uses as much as digits as its factorization.

133544461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 31.

The square root of 133544461 is about 11556.1438637636. The cubic root of 133544461 is about 511.1424612658.

Adding to 133544461 its reverse (164445331), we get a palindrome (297989792).

It can be divided in two parts, 1335 and 44461, that added together give a square (45796 = 214²).

The spelling of 133544461 in words is "one hundred thirty-three million, five hundred forty-four thousand, four hundred sixty-one".