133942811 has 4 divisors (see below), whose sum is σ = 133966872. Its totient is φ = 133918752.

The previous prime is 133942801. The next prime is 133942817. The reversal of 133942811 is 118249331.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 133942811 - 2⁶ = 133942747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133942817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1091 + ... + 16403.

It is an arithmetic number, because the mean of its divisors is an integer number (33491718).

Almost surely, 2^133942811 is an apocalyptic number.

133942811 is a deficient number, since it is larger than the sum of its proper divisors (24061).

133942811 is an equidigital number, since it uses as much as digits as its factorization.

133942811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24060.

The product of its digits is 5184, while the sum is 32.

The square root of 133942811 is about 11573.3664506055. The cubic root of 133942811 is about 511.6501860081.

The spelling of 133942811 in words is "one hundred thirty-three million, nine hundred forty-two thousand, eight hundred eleven".