133539851 has 4 divisors (see below), whose sum is σ = 133606104. Its totient is φ = 133473600.

The previous prime is 133539841. The next prime is 133539859. The reversal of 133539851 is 158935331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 158935331 = 809 ⋅196459.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133539851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133539859) 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, 30005 + ... + 34166.

It is an arithmetic number, because the mean of its divisors is an integer number (33401526).

Almost surely, 2^133539851 is an apocalyptic number.

133539851 is a deficient number, since it is larger than the sum of its proper divisors (66253).

133539851 is an equidigital number, since it uses as much as digits as its factorization.

133539851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66252.

The product of its digits is 48600, while the sum is 38.

The square root of 133539851 is about 11555.9444010431. The cubic root of 133539851 is about 511.1365795945.

The spelling of 133539851 in words is "one hundred thirty-three million, five hundred thirty-nine thousand, eight hundred fifty-one".