133730 has 16 divisors (see below), whose sum is σ = 247104. Its totient is φ = 52080.

The previous prime is 133723. The next prime is 133733. The reversal of 133730 is 37331.

It is a plaindrome in base 9.

It is a zygodrome in base 9.

It is a junction number, because it is equal to n+sod(n) for n = 133699 and 133708.

It is not an unprimeable number, because it can be changed into a prime (133733) by changing a digit.

133730 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 7 ways as a sum of consecutive naturals, for example, 275 + ... + 585.

It is an arithmetic number, because the mean of its divisors is an integer number (15444).

2¹³³⁷³⁰ is an apocalyptic number.

133730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

133730 is a deficient number, since it is larger than the sum of its proper divisors (113374).

133730 is a wasteful number, since it uses less digits than its factorization.

133730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361.

The product of its (nonzero) digits is 189, while the sum is 17.

The square root of 133730 is about 365.6911264989. The cubic root of 133730 is about 51.1379069044.

The spelling of 133730 in words is "one hundred thirty-three thousand, seven hundred thirty".