133721267 has 2 divisors, whose sum is σ = 133721268. Its totient is φ = 133721266.

The previous prime is 133721257. The next prime is 133721299. The reversal of 133721267 is 762127331.

It is an a-pointer prime, because the next prime (133721299) can be obtained adding 133721267 to its sum of digits (32).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133721267 is a prime.

It is not a weakly prime, because it can be changed into another prime (133721207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66860633 + 66860634.

It is an arithmetic number, because the mean of its divisors is an integer number (66860634).

Almost surely, 2^133721267 is an apocalyptic number.

133721267 is a deficient number, since it is larger than the sum of its proper divisors (1).

133721267 is an equidigital number, since it uses as much as digits as its factorization.

133721267 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10584, while the sum is 32.

The square root of 133721267 is about 11563.7912035803. The cubic root of 133721267 is about 511.3679372347.

Adding to 133721267 its reverse (762127331), we get a palindrome (895848598).

The spelling of 133721267 in words is "one hundred thirty-three million, seven hundred twenty-one thousand, two hundred sixty-seven".