133611317 has 4 divisors (see below), whose sum is σ = 152698656. Its totient is φ = 114523980.

The previous prime is 133611307. The next prime is 133611337. The reversal of 133611317 is 713116331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 133611317 - 2⁶ = 133611253 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 (133611307) 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, 9543659 + ... + 9543672.

It is an arithmetic number, because the mean of its divisors is an integer number (38174664).

Almost surely, 2^133611317 is an apocalyptic number.

It is an amenable number.

133611317 is a deficient number, since it is larger than the sum of its proper divisors (19087339).

133611317 is an equidigital number, since it uses as much as digits as its factorization.

133611317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19087338.

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

The square root of 133611317 is about 11559.0361622412. The cubic root of 133611317 is about 511.2277443220.

Adding to 133611317 its reverse (713116331), we get a palindrome (846727648).

The spelling of 133611317 in words is "one hundred thirty-three million, six hundred eleven thousand, three hundred seventeen".