133706557 has 2 divisors, whose sum is σ = 133706558. Its totient is φ = 133706556.

The previous prime is 133706537. The next prime is 133706593. The reversal of 133706557 is 755607331.

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., 106936281 + 26770276 = 10341^2 + 5174^2 .

It is an emirp because it is prime and its reverse (755607331) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133706557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133706537) 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, 66853278 + 66853279.

It is an arithmetic number, because the mean of its divisors is an integer number (66853279).

Almost surely, 2^133706557 is an apocalyptic number.

It is an amenable number.

133706557 is a deficient number, since it is larger than the sum of its proper divisors (1).

133706557 is an equidigital number, since it uses as much as digits as its factorization.

133706557 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 66150, while the sum is 37.

The square root of 133706557 is about 11563.1551490067. The cubic root of 133706557 is about 511.3491855473.

The spelling of 133706557 in words is "one hundred thirty-three million, seven hundred six thousand, five hundred fifty-seven".