133636 has 6 divisors (see below), whose sum is σ = 233870. Its totient is φ = 66816.

The previous prime is 133633. The next prime is 133649. The reversal of 133636 is 636331.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 93636 + 40000 = 306^2 + 200^2 .

It is not an unprimeable number, because it can be changed into a prime (133631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16701 + ... + 16708.

2¹³³⁶³⁶ is an apocalyptic number.

It is an amenable number.

133636 is a deficient number, since it is larger than the sum of its proper divisors (100234).

133636 is a wasteful number, since it uses less digits than its factorization.

133636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33413 (or 33411 counting only the distinct ones).

The product of its digits is 972, while the sum is 22.

The square root of 133636 is about 365.5625801419. The cubic root of 133636 is about 51.1259223336.

Adding to 133636 its reverse (636331), we get a palindrome (769967).

The spelling of 133636 in words is "one hundred thirty-three thousand, six hundred thirty-six".