133135613 has 4 divisors (see below), whose sum is σ = 143376828. Its totient is φ = 122894400.

The previous prime is 133135601. The next prime is 133135649. The reversal of 133135613 is 316531331.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 316531331 = 251 ⋅1261081.

It can be written as a sum of positive squares in 2 ways, for example, as 10413529 + 122722084 = 3227^2 + 11078^2 .

It is a cyclic number.

It is not a de Polignac number, because 133135613 - 2¹⁸ = 132873469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133135663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5120588 + ... + 5120613.

It is an arithmetic number, because the mean of its divisors is an integer number (35844207).

Almost surely, 2^133135613 is an apocalyptic number.

133135613 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

133135613 is a deficient number, since it is larger than the sum of its proper divisors (10241215).

133135613 is a wasteful number, since it uses less digits than its factorization.

133135613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10241214.

The product of its digits is 2430, while the sum is 26.

The square root of 133135613 is about 11538.4406658786. The cubic root of 133135613 is about 510.6203050755.

Adding to 133135613 its reverse (316531331), we get a palindrome (449666944).

The spelling of 133135613 in words is "one hundred thirty-three million, one hundred thirty-five thousand, six hundred thirteen".