133765747 has 4 divisors (see below), whose sum is σ = 134163016. Its totient is φ = 133368480.

The previous prime is 133765721. The next prime is 133765759. The reversal of 133765747 is 747567331.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133765747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133765147) 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 3 ways as a sum of consecutive naturals, for example, 198129 + ... + 198802.

It is an arithmetic number, because the mean of its divisors is an integer number (33540754).

Almost surely, 2^133765747 is an apocalyptic number.

133765747 is a deficient number, since it is larger than the sum of its proper divisors (397269).

133765747 is an equidigital number, since it uses as much as digits as its factorization.

133765747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397268.

The product of its digits is 370440, while the sum is 43.

The square root of 133765747 is about 11565.7142883611. The cubic root of 133765747 is about 511.4246300975.

The spelling of 133765747 in words is "one hundred thirty-three million, seven hundred sixty-five thousand, seven hundred forty-seven".