133709536 has 24 divisors (see below), whose sum is σ = 277096680. Its totient is φ = 63335808.

The previous prime is 133709533. The next prime is 133709549. The reversal of 133709536 is 635907331.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 133709495 and 133709504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133709533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109351 + ... + 110566.

It is an arithmetic number, because the mean of its divisors is an integer number (11545695).

Almost surely, 2^133709536 is an apocalyptic number.

133709536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

133709536 is an abundant number, since it is smaller than the sum of its proper divisors (143387144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

133709536 is a wasteful number, since it uses less digits than its factorization.

133709536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219946 (or 219938 counting only the distinct ones).

The product of its (nonzero) digits is 51030, while the sum is 37.

The square root of 133709536 is about 11563.2839626120. The cubic root of 133709536 is about 511.3529831619.

The spelling of 133709536 in words is "one hundred thirty-three million, seven hundred nine thousand, five hundred thirty-six".