133203613 has 2 divisors, whose sum is σ = 133203614. Its totient is φ = 133203612.

The previous prime is 133203607. The next prime is 133203643. The reversal of 133203613 is 316302331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 110944089 + 22259524 = 10533^2 + 4718^2 .

It is a cyclic number.

It is not a de Polignac number, because 133203613 - 2⁹ = 133203101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133203643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66601806 + 66601807.

It is an arithmetic number, because the mean of its divisors is an integer number (66601807).

Almost surely, 2^133203613 is an apocalyptic number.

It is an amenable number.

133203613 is a deficient number, since it is larger than the sum of its proper divisors (1).

133203613 is an equidigital number, since it uses as much as digits as its factorization.

133203613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 22.

The square root of 133203613 is about 11541.3869617131. The cubic root of 133203613 is about 510.7072246459.

Adding to 133203613 its reverse (316302331), we get a palindrome (449505944).

The spelling of 133203613 in words is "one hundred thirty-three million, two hundred three thousand, six hundred thirteen".