133243573 has 2 divisors, whose sum is σ = 133243574. Its totient is φ = 133243572.

The previous prime is 133243559. The next prime is 133243589. The reversal of 133243573 is 375342331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75377124 + 57866449 = 8682^2 + 7607^2 .

It is a cyclic number.

It is not a de Polignac number, because 133243573 - 2¹⁷ = 133112501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133243273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66621786 + 66621787.

It is an arithmetic number, because the mean of its divisors is an integer number (66621787).

Almost surely, 2^133243573 is an apocalyptic number.

It is an amenable number.

133243573 is a deficient number, since it is larger than the sum of its proper divisors (1).

133243573 is an equidigital number, since it uses as much as digits as its factorization.

133243573 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22680, while the sum is 31.

The square root of 133243573 is about 11543.1179929861. The cubic root of 133243573 is about 510.7582888772.

The spelling of 133243573 in words is "one hundred thirty-three million, two hundred forty-three thousand, five hundred seventy-three".