133117613 has 4 divisors (see below), whose sum is σ = 133598460. Its totient is φ = 132636768.

The previous prime is 133117577. The next prime is 133117619. The reversal of 133117613 is 316711331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 316711331 = 307 ⋅1031633.

It can be written as a sum of positive squares in 2 ways, for example, as 78623689 + 54493924 = 8867^2 + 7382^2 .

It is a cyclic number.

It is not a de Polignac number, because 133117613 - 2⁸ = 133117357 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133117619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 240008 + ... + 240561.

It is an arithmetic number, because the mean of its divisors is an integer number (33399615).

Almost surely, 2^133117613 is an apocalyptic number.

It is an amenable number.

133117613 is a deficient number, since it is larger than the sum of its proper divisors (480847).

133117613 is an equidigital number, since it uses as much as digits as its factorization.

133117613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480846.

The product of its digits is 1134, while the sum is 26.

The square root of 133117613 is about 11537.6606381016. The cubic root of 133117613 is about 510.5972920000.

Adding to 133117613 its reverse (316711331), we get a palindrome (449828944).

The spelling of 133117613 in words is "one hundred thirty-three million, one hundred seventeen thousand, six hundred thirteen".