133740557 has 2 divisors, whose sum is σ = 133740558. Its totient is φ = 133740556.

The previous prime is 133740511. The next prime is 133740569. The reversal of 133740557 is 755047331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 105555076 + 28185481 = 10274^2 + 5309^2 .

It is a cyclic number.

It is not a de Polignac number, because 133740557 - 2²⁰ = 132691981 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133740577) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66870278 + 66870279.

It is an arithmetic number, because the mean of its divisors is an integer number (66870279).

Almost surely, 2^133740557 is an apocalyptic number.

It is an amenable number.

133740557 is a deficient number, since it is larger than the sum of its proper divisors (1).

133740557 is an equidigital number, since it uses as much as digits as its factorization.

133740557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 44100, while the sum is 35.

The square root of 133740557 is about 11564.6252425230. The cubic root of 133740557 is about 511.3925252290.

Adding to 133740557 its reverse (755047331), we get a palindrome (888787888).

The spelling of 133740557 in words is "one hundred thirty-three million, seven hundred forty thousand, five hundred fifty-seven".