133388289 has 24 divisors (see below), whose sum is σ = 201903520. Its totient is φ = 87993216.

The previous prime is 133388287. The next prime is 133388291. The reversal of 133388289 is 982883331.

It is an interprime number because it is at equal distance from previous prime (133388287) and next prime (133388291).

It is not a de Polignac number, because 133388289 - 2¹ = 133388287 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 (133388287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20742 + ... + 26400.

Almost surely, 2^133388289 is an apocalyptic number.

It is an amenable number.

133388289 is a deficient number, since it is larger than the sum of its proper divisors (68515231).

133388289 is an frugal number, since it uses more digits than its factorization.

133388289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5771 (or 5759 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The square root of 133388289 is about 11549.3847888102. The cubic root of 133388289 is about 510.9431336977.

The spelling of 133388289 in words is "one hundred thirty-three million, three hundred eighty-eight thousand, two hundred eighty-nine".