133398 has 12 divisors (see below), whose sum is σ = 289068. Its totient is φ = 44460.

The previous prime is 133391. The next prime is 133403. The reversal of 133398 is 893331.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133391) by changing a digit.

133398 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3688 + ... + 3723.

It is an arithmetic number, because the mean of its divisors is an integer number (24089).

2¹³³³⁹⁸ is an apocalyptic number.

133398 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

133398 is an abundant number, since it is smaller than the sum of its proper divisors (155670).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

133398 is a wasteful number, since it uses less digits than its factorization.

133398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7419 (or 7416 counting only the distinct ones).

The product of its digits is 1944, while the sum is 27.

The square root of 133398 is about 365.2369094163. The cubic root of 133398 is about 51.0955532708.

It can be divided in two parts, 1333 and 98, that added together give a triangular number (1431 = T₅₃).

The spelling of 133398 in words is "one hundred thirty-three thousand, three hundred ninety-eight".