133608553 has 4 divisors (see below), whose sum is σ = 143886148. Its totient is φ = 123330960.

The previous prime is 133608529. The next prime is 133608569. The reversal of 133608553 is 355806331.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 64834704 + 68773849 = 8052^2 + 8293^2 .

It is a cyclic number.

It is not a de Polignac number, because 133608553 - 2⁵ = 133608521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133618553) 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 in 3 ways as a sum of consecutive naturals, for example, 5138778 + ... + 5138803.

It is an arithmetic number, because the mean of its divisors is an integer number (35971537).

Almost surely, 2^133608553 is an apocalyptic number.

133608553 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

133608553 is a deficient number, since it is larger than the sum of its proper divisors (10277595).

133608553 is a wasteful number, since it uses less digits than its factorization.

133608553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10277594.

The product of its (nonzero) digits is 32400, while the sum is 34.

The square root of 133608553 is about 11558.9166014813. The cubic root of 133608553 is about 511.2242190637.

The spelling of 133608553 in words is "one hundred thirty-three million, six hundred eight thousand, five hundred fifty-three".