133240613 has 8 divisors (see below), whose sum is σ = 145437120. Its totient is φ = 121058080.

The previous prime is 133240609. The next prime is 133240631. The reversal of 133240613 is 316042331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 133240613 - 2² = 133240609 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 (133240603) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33968 + ... + 37686.

It is an arithmetic number, because the mean of its divisors is an integer number (18179640).

Almost surely, 2^133240613 is an apocalyptic number.

It is an amenable number.

133240613 is a deficient number, since it is larger than the sum of its proper divisors (12196507).

133240613 is a wasteful number, since it uses less digits than its factorization.

133240613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6987.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 133240613 is about 11542.9897773497. The cubic root of 133240613 is about 510.7545066917.

Adding to 133240613 its reverse (316042331), we get a palindrome (449282944).

The spelling of 133240613 in words is "one hundred thirty-three million, two hundred forty thousand, six hundred thirteen".