133718 has 16 divisors (see below), whose sum is σ = 223440. Its totient is φ = 59616.

The previous prime is 133717. The next prime is 133723. The reversal of 133718 is 817331.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 133693 and 133702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 893 + ... + 1031.

It is an arithmetic number, because the mean of its divisors is an integer number (13965).

2¹³³⁷¹⁸ is an apocalyptic number.

133718 is a deficient number, since it is larger than the sum of its proper divisors (89722).

133718 is a wasteful number, since it uses less digits than its factorization.

133718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191.

The product of its digits is 504, while the sum is 23.

The square root of 133718 is about 365.6747188418. The cubic root of 133718 is about 51.1363772720.

The spelling of 133718 in words is "one hundred thirty-three thousand, seven hundred eighteen".