133420307 has 4 divisors (see below), whose sum is σ = 133625280. Its totient is φ = 133215336.

The previous prime is 133420283. The next prime is 133420351. The reversal of 133420307 is 703024331.

It is a happy number.

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 133420307 - 2²⁰ = 132371731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133420207) 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, 101507 + ... + 102812.

It is an arithmetic number, because the mean of its divisors is an integer number (33406320).

Almost surely, 2^133420307 is an apocalyptic number.

133420307 is a deficient number, since it is larger than the sum of its proper divisors (204973).

133420307 is an equidigital number, since it uses as much as digits as its factorization.

133420307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204972.

The product of its (nonzero) digits is 1512, while the sum is 23.

The square root of 133420307 is about 11550.7708400782. The cubic root of 133420307 is about 510.9840120202.

Adding to 133420307 its reverse (703024331), we get a palindrome (836444638).

The spelling of 133420307 in words is "one hundred thirty-three million, four hundred twenty thousand, three hundred seven".