133837613 has 16 divisors (see below), whose sum is σ = 166817280. Its totient is φ = 104547456.

The previous prime is 133837609. The next prime is 133837673. The reversal of 133837613 is 316738331.

It is not a de Polignac number, because 133837613 - 2² = 133837609 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133837673) 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 15 ways as a sum of consecutive naturals, for example, 2120 + ... + 16497.

It is an arithmetic number, because the mean of its divisors is an integer number (10426080).

Almost surely, 2^133837613 is an apocalyptic number.

133837613 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

133837613 is a deficient number, since it is larger than the sum of its proper divisors (32979667).

133837613 is a wasteful number, since it uses less digits than its factorization.

133837613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18716.

The product of its digits is 27216, while the sum is 35.

The square root of 133837613 is about 11568.8207264181. The cubic root of 133837613 is about 511.5162017771.

The spelling of 133837613 in words is "one hundred thirty-three million, eight hundred thirty-seven thousand, six hundred thirteen".