133749331 has 2 divisors, whose sum is σ = 133749332. Its totient is φ = 133749330.

The previous prime is 133749211. The next prime is 133749349. The reversal of 133749331 is 133947331.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 133749331 - 2¹¹ = 133747283 is a prime.

It is a super-2 number, since 2×133749331² = 35777767085895122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (133749361) by changing a digit.

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

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66874665 + 66874666.

It is an arithmetic number, because the mean of its divisors is an integer number (66874666).

Almost surely, 2^133749331 is an apocalyptic number.

133749331 is a deficient number, since it is larger than the sum of its proper divisors (1).

133749331 is an equidigital number, since it uses as much as digits as its factorization.

133749331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20412, while the sum is 34.

The square root of 133749331 is about 11565.0045827920. The cubic root of 133749331 is about 511.4037082238.

The spelling of 133749331 in words is "one hundred thirty-three million, seven hundred forty-nine thousand, three hundred thirty-one".