133273817 has 2 divisors, whose sum is σ = 133273818. Its totient is φ = 133273816.

The previous prime is 133273807. The next prime is 133273823. The reversal of 133273817 is 718372331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82065481 + 51208336 = 9059^2 + 7156^2 .

It is a cyclic number.

It is not a de Polignac number, because 133273817 - 2⁸ = 133273561 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (133273807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66636908 + 66636909.

It is an arithmetic number, because the mean of its divisors is an integer number (66636909).

Almost surely, 2^133273817 is an apocalyptic number.

It is an amenable number.

133273817 is a deficient number, since it is larger than the sum of its proper divisors (1).

133273817 is an equidigital number, since it uses as much as digits as its factorization.

133273817 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21168, while the sum is 35.

The square root of 133273817 is about 11544.4279633077. The cubic root of 133273817 is about 510.7969304035.

It can be divided in two parts, 1332738 and 17, that multiplied together give a triangular number (22656546 = T₆₇₃₁).

The spelling of 133273817 in words is "one hundred thirty-three million, two hundred seventy-three thousand, eight hundred seventeen".