133306403 has 2 divisors, whose sum is σ = 133306404. Its totient is φ = 133306402.

The previous prime is 133306373. The next prime is 133306423. The reversal of 133306403 is 304603331.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 133306403 - 2⁶ = 133306339 is a prime.

It is not a weakly prime, because it can be changed into another prime (133306423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66653201 + 66653202.

It is an arithmetic number, because the mean of its divisors is an integer number (66653202).

Almost surely, 2^133306403 is an apocalyptic number.

133306403 is a deficient number, since it is larger than the sum of its proper divisors (1).

133306403 is an equidigital number, since it uses as much as digits as its factorization.

133306403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 23.

The square root of 133306403 is about 11545.8392072642. The cubic root of 133306403 is about 510.8385576657.

Adding to 133306403 its reverse (304603331), we get a palindrome (437909734).

The spelling of 133306403 in words is "one hundred thirty-three million, three hundred six thousand, four hundred three".