133506537 has 8 divisors (see below), whose sum is σ = 182350560. Its totient is φ = 86833440.

The previous prime is 133506493. The next prime is 133506551. The reversal of 133506537 is 735605331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 133506537 - 2⁶ = 133506473 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 133506498 and 133506507.

It is not an unprimeable number, because it can be changed into a prime (133506577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 542587 + ... + 542832.

It is an arithmetic number, because the mean of its divisors is an integer number (22793820).

Almost surely, 2^133506537 is an apocalyptic number.

It is an amenable number.

133506537 is a deficient number, since it is larger than the sum of its proper divisors (48844023).

133506537 is a wasteful number, since it uses less digits than its factorization.

133506537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1085463.

The product of its (nonzero) digits is 28350, while the sum is 33.

The square root of 133506537 is about 11554.5028884846. The cubic root of 133506537 is about 511.0940718835.

The spelling of 133506537 in words is "one hundred thirty-three million, five hundred six thousand, five hundred thirty-seven".