133436 has 6 divisors (see below), whose sum is σ = 233520. Its totient is φ = 66716.

The previous prime is 133417. The next prime is 133439. The reversal of 133436 is 634331.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133439) by changing a digit.

133436 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 as a sum of consecutive naturals, namely, 16676 + ... + 16683.

It is an arithmetic number, because the mean of its divisors is an integer number (38920).

2¹³³⁴³⁶ is an apocalyptic number.

It is an amenable number.

133436 is a deficient number, since it is larger than the sum of its proper divisors (100084).

133436 is a wasteful number, since it uses less digits than its factorization.

133436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33363 (or 33361 counting only the distinct ones).

The product of its digits is 648, while the sum is 20.

The square root of 133436 is about 365.2889267416. The cubic root of 133436 is about 51.1004045347.

Adding to 133436 its reverse (634331), we get a palindrome (767767).

The spelling of 133436 in words is "one hundred thirty-three thousand, four hundred thirty-six".