133144307 has 4 divisors (see below), whose sum is σ = 137735520. Its totient is φ = 128553096.

The previous prime is 133144283. The next prime is 133144313. The reversal of 133144307 is 703441331.

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 133144307 - 2⁶ = 133144243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133144327) 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, 2295563 + ... + 2295620.

It is an arithmetic number, because the mean of its divisors is an integer number (34433880).

Almost surely, 2^133144307 is an apocalyptic number.

133144307 is a deficient number, since it is larger than the sum of its proper divisors (4591213).

133144307 is an equidigital number, since it uses as much as digits as its factorization.

133144307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4591212.

The product of its (nonzero) digits is 3024, while the sum is 26.

The square root of 133144307 is about 11538.8174004098. The cubic root of 133144307 is about 510.6314196481.

Adding to 133144307 its reverse (703441331), we get a palindrome (836585638).

The spelling of 133144307 in words is "one hundred thirty-three million, one hundred forty-four thousand, three hundred seven".