133783 has 8 divisors (see below), whose sum is σ = 148176. Its totient is φ = 120000.

The previous prime is 133781. The next prime is 133801. The reversal of 133783 is 387331.

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 133783 - 2¹ = 133781 is a prime.

It is a Duffinian number.

It is a plaindrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133781) 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, 408 + ... + 658.

It is an arithmetic number, because the mean of its divisors is an integer number (18522).

2¹³³⁷⁸³ is an apocalyptic number.

133783 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

133783 is a deficient number, since it is larger than the sum of its proper divisors (14393).

133783 is a wasteful number, since it uses less digits than its factorization.

133783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305.

The product of its digits is 1512, while the sum is 25.

The square root of 133783 is about 365.7635848468. The cubic root of 133783 is about 51.1446616867.

The spelling of 133783 in words is "one hundred thirty-three thousand, seven hundred eighty-three".