133494917 has 4 divisors (see below), whose sum is σ = 138098220. Its totient is φ = 128891616.

The previous prime is 133494877. The next prime is 133494929. The reversal of 133494917 is 719494331.

It is a happy number.

It is a Cunningham number, because it is equal to 11554²+1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 69989956 + 63504961 = 8366^2 + 7969^2 .

It is a cyclic number.

It is not a de Polignac number, because 133494917 - 2¹⁴ = 133478533 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 (133494947) 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, 2301608 + ... + 2301665.

It is an arithmetic number, because the mean of its divisors is an integer number (34524555).

Almost surely, 2^133494917 is an apocalyptic number.

It is an amenable number.

133494917 is a deficient number, since it is larger than the sum of its proper divisors (4603303).

133494917 is an equidigital number, since it uses as much as digits as its factorization.

133494917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4603302.

The product of its digits is 81648, while the sum is 41.

The square root of 133494917 is about 11554.0000432751. Note that the first 4 decimals coincide. The cubic root of 133494917 is about 511.0792434325.

The spelling of 133494917 in words is "one hundred thirty-three million, four hundred ninety-four thousand, nine hundred seventeen".