133305407 has 2 divisors, whose sum is σ = 133305408. Its totient is φ = 133305406.

The previous prime is 133305353. The next prime is 133305409. The reversal of 133305407 is 704503331.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 133305407 - 2⁶ = 133305343 is a prime.

Together with 133305409, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133305409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66652703 + 66652704.

It is an arithmetic number, because the mean of its divisors is an integer number (66652704).

Almost surely, 2^133305407 is an apocalyptic number.

133305407 is a deficient number, since it is larger than the sum of its proper divisors (1).

133305407 is an equidigital number, since it uses as much as digits as its factorization.

133305407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3780, while the sum is 26.

The square root of 133305407 is about 11545.7960747625. The cubic root of 133305407 is about 510.8372854175.

Adding to 133305407 its reverse (704503331), we get a palindrome (837808738).

The spelling of 133305407 in words is "one hundred thirty-three million, three hundred five thousand, four hundred seven".