133003243 has 4 divisors (see below), whose sum is σ = 133036848. Its totient is φ = 132969640.

The previous prime is 133003231. The next prime is 133003253. The reversal of 133003243 is 342300331.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 133003243 - 2⁹ = 133002731 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 133003243.

It is not an unprimeable number, because it can be changed into a prime (133003253) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9928 + ... + 19093.

It is an arithmetic number, because the mean of its divisors is an integer number (33259212).

Almost surely, 2^133003243 is an apocalyptic number.

133003243 is a deficient number, since it is larger than the sum of its proper divisors (33605).

133003243 is an equidigital number, since it uses as much as digits as its factorization.

133003243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33604.

The product of its (nonzero) digits is 648, while the sum is 19.

The square root of 133003243 is about 11532.7031956953. The cubic root of 133003243 is about 510.4510209865.

Adding to 133003243 its reverse (342300331), we get a palindrome (475303574).

The spelling of 133003243 in words is "one hundred thirty-three million, three thousand, two hundred forty-three".