133717289 has 8 divisors (see below), whose sum is σ = 138809160. Its totient is φ = 128657536.

The previous prime is 133717273. The next prime is 133717321. The reversal of 133717289 is 982717331.

It can be written as a sum of positive squares in 4 ways, for example, as 84787264 + 48930025 = 9208^2 + 6995^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 133717289 - 2⁴ = 133717273 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (133717589) 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, 629 + ... + 16365.

It is an arithmetic number, because the mean of its divisors is an integer number (17351145).

Almost surely, 2^133717289 is an apocalyptic number.

It is an amenable number.

133717289 is a deficient number, since it is larger than the sum of its proper divisors (5091871).

133717289 is a wasteful number, since it uses less digits than its factorization.

133717289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16059.

The product of its digits is 63504, while the sum is 41.

The square root of 133717289 is about 11563.6191998872. The cubic root of 133717289 is about 511.3628663838.

The spelling of 133717289 in words is "one hundred thirty-three million, seven hundred seventeen thousand, two hundred eighty-nine".