133231169 has 2 divisors, whose sum is σ = 133231170. Its totient is φ = 133231168.

The previous prime is 133231139. The next prime is 133231171. The reversal of 133231169 is 961132331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 119093569 + 14137600 = 10913^2 + 3760^2 .

It is an emirp because it is prime and its reverse (961132331) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133231169 is a prime.

It is a super-2 number, since 2×133231169² = 35501088786213122, which contains 22 as substring.

Together with 133231171, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (133231129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66615584 + 66615585.

It is an arithmetic number, because the mean of its divisors is an integer number (66615585).

Almost surely, 2^133231169 is an apocalyptic number.

It is an amenable number.

133231169 is a deficient number, since it is larger than the sum of its proper divisors (1).

133231169 is an equidigital number, since it uses as much as digits as its factorization.

133231169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2916, while the sum is 29.

The square root of 133231169 is about 11542.5806906428. The cubic root of 133231169 is about 510.7424391011.

The spelling of 133231169 in words is "one hundred thirty-three million, two hundred thirty-one thousand, one hundred sixty-nine".